./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 20:04:16,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 20:04:16,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 20:04:16,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 20:04:16,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 20:04:16,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 20:04:16,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 20:04:16,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 20:04:16,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 20:04:16,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 20:04:16,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 20:04:16,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 20:04:16,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 20:04:16,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 20:04:16,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 20:04:16,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 20:04:16,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 20:04:16,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 20:04:16,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 20:04:16,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 20:04:16,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 20:04:16,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 20:04:16,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 20:04:16,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 20:04:16,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 20:04:16,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 20:04:16,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 20:04:16,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 20:04:16,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 20:04:16,419 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 20:04:16,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 20:04:16,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 20:04:16,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 20:04:16,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 20:04:16,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 20:04:16,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 20:04:16,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 20:04:16,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 20:04:16,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 20:04:16,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 20:04:16,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 20:04:16,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-18 20:04:16,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 20:04:16,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 20:04:16,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 20:04:16,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 20:04:16,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 20:04:16,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 20:04:16,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 20:04:16,440 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 20:04:16,440 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 20:04:16,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 20:04:16,440 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-18 20:04:16,440 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-18 20:04:16,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 20:04:16,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-18 20:04:16,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 20:04:16,441 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-18 20:04:16,441 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-18 20:04:16,441 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-18 20:04:16,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 20:04:16,442 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-18 20:04:16,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-18 20:04:16,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 20:04:16,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 20:04:16,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 20:04:16,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 20:04:16,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:04:16,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 20:04:16,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 20:04:16,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 20:04:16,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 20:04:16,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 20:04:16,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2021-12-18 20:04:16,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 20:04:16,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 20:04:16,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 20:04:16,674 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 20:04:16,675 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 20:04:16,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2021-12-18 20:04:16,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f281dc767/cb01a71ac0b9455e876405b029d45171/FLAG885f94478 [2021-12-18 20:04:17,170 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 20:04:17,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2021-12-18 20:04:17,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f281dc767/cb01a71ac0b9455e876405b029d45171/FLAG885f94478 [2021-12-18 20:04:17,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f281dc767/cb01a71ac0b9455e876405b029d45171 [2021-12-18 20:04:17,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 20:04:17,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 20:04:17,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 20:04:17,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 20:04:17,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 20:04:17,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576a87fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17, skipping insertion in model container [2021-12-18 20:04:17,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 20:04:17,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 20:04:17,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:04:17,512 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 20:04:17,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 20:04:17,570 INFO L208 MainTranslator]: Completed translation [2021-12-18 20:04:17,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17 WrapperNode [2021-12-18 20:04:17,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 20:04:17,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 20:04:17,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 20:04:17,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 20:04:17,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,607 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2021-12-18 20:04:17,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 20:04:17,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 20:04:17,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 20:04:17,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 20:04:17,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 20:04:17,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 20:04:17,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 20:04:17,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 20:04:17,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (1/1) ... [2021-12-18 20:04:17,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 20:04:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:17,658 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) [2021-12-18 20:04:17,676 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 [2021-12-18 20:04:17,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 20:04:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 20:04:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 20:04:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 20:04:17,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 20:04:17,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 20:04:17,767 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 20:04:17,768 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 20:04:17,964 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 20:04:17,968 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 20:04:17,969 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-18 20:04:17,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:04:17 BoogieIcfgContainer [2021-12-18 20:04:17,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 20:04:17,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 20:04:17,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 20:04:17,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 20:04:17,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:04:17" (1/3) ... [2021-12-18 20:04:17,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2434e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:04:17, skipping insertion in model container [2021-12-18 20:04:17,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:04:17" (2/3) ... [2021-12-18 20:04:17,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2434e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:04:17, skipping insertion in model container [2021-12-18 20:04:17,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:04:17" (3/3) ... [2021-12-18 20:04:17,976 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2021-12-18 20:04:17,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 20:04:17,980 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-18 20:04:18,010 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 20:04:18,015 INFO L339 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 20:04:18,015 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-18 20:04:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 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) [2021-12-18 20:04:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 20:04:18,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:18,042 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:18,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:18,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:18,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-18 20:04:18,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:18,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564355639] [2021-12-18 20:04:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:18,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:18,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:18,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564355639] [2021-12-18 20:04:18,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564355639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:18,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:18,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:04:18,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637119678] [2021-12-18 20:04:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:18,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:18,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:18,264 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:18,306 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-18 20:04:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 20:04:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:18,316 INFO L225 Difference]: With dead ends: 96 [2021-12-18 20:04:18,316 INFO L226 Difference]: Without dead ends: 92 [2021-12-18 20:04:18,318 INFO L932 BasicCegarLoop]: 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 [2021-12-18 20:04:18,322 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:18,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-18 20:04:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2021-12-18 20:04:18,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 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) [2021-12-18 20:04:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-18 20:04:18,360 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-12-18 20:04:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:18,360 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-18 20:04:18,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-18 20:04:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 20:04:18,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:18,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:18,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 20:04:18,361 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-18 20:04:18,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:18,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97436600] [2021-12-18 20:04:18,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:18,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:18,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97436600] [2021-12-18 20:04:18,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97436600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:18,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:18,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:04:18,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118164127] [2021-12-18 20:04:18,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:18,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:04:18,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:18,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:04:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:18,405 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:18,455 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-12-18 20:04:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:04:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 20:04:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:18,456 INFO L225 Difference]: With dead ends: 51 [2021-12-18 20:04:18,457 INFO L226 Difference]: Without dead ends: 51 [2021-12-18 20:04:18,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:18,458 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:18,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-18 20:04:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-18 20:04:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 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) [2021-12-18 20:04:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-12-18 20:04:18,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2021-12-18 20:04:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:18,466 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-12-18 20:04:18,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-12-18 20:04:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-18 20:04:18,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:18,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:18,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 20:04:18,469 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-18 20:04:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:18,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279363674] [2021-12-18 20:04:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:18,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:18,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279363674] [2021-12-18 20:04:18,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279363674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:18,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:18,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:04:18,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775327397] [2021-12-18 20:04:18,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:18,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:18,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:18,526 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:18,618 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-12-18 20:04:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-18 20:04:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:18,620 INFO L225 Difference]: With dead ends: 93 [2021-12-18 20:04:18,620 INFO L226 Difference]: Without dead ends: 93 [2021-12-18 20:04:18,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:04:18,621 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:18,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-18 20:04:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2021-12-18 20:04:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 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) [2021-12-18 20:04:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-12-18 20:04:18,626 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2021-12-18 20:04:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:18,626 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-12-18 20:04:18,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-12-18 20:04:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 20:04:18,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:18,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:18,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 20:04:18,627 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:18,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:18,628 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-18 20:04:18,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:18,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865314374] [2021-12-18 20:04:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:18,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:18,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:18,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865314374] [2021-12-18 20:04:18,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865314374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:18,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:18,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:04:18,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795346185] [2021-12-18 20:04:18,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:18,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:18,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:18,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:18,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:18,678 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 20:04:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:18,705 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-12-18 20:04:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 20:04:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:18,708 INFO L225 Difference]: With dead ends: 52 [2021-12-18 20:04:18,708 INFO L226 Difference]: Without dead ends: 52 [2021-12-18 20:04:18,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:18,714 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:18,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-18 20:04:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-18 20:04:18,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 51 states have internal predecessors, (61), 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) [2021-12-18 20:04:18,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-12-18 20:04:18,728 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2021-12-18 20:04:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:18,729 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-12-18 20:04:18,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 20:04:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-12-18 20:04:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 20:04:18,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:18,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:18,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 20:04:18,730 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-18 20:04:18,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:18,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567036612] [2021-12-18 20:04:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:18,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:18,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567036612] [2021-12-18 20:04:18,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567036612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:18,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:18,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:04:18,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244538419] [2021-12-18 20:04:18,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:18,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:18,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:18,780 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 20:04:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:18,805 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-18 20:04:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 20:04:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:18,807 INFO L225 Difference]: With dead ends: 94 [2021-12-18 20:04:18,808 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 20:04:18,809 INFO L932 BasicCegarLoop]: 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 [2021-12-18 20:04:18,809 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:18,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:18,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 20:04:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-12-18 20:04:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 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) [2021-12-18 20:04:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-18 20:04:18,821 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-12-18 20:04:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:18,821 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-18 20:04:18,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-12-18 20:04:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-18 20:04:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 20:04:18,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:18,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:18,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 20:04:18,823 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:18,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-18 20:04:18,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:18,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422733381] [2021-12-18 20:04:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:18,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:18,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422733381] [2021-12-18 20:04:18,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422733381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:18,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:18,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-18 20:04:18,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207278184] [2021-12-18 20:04:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:18,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:04:18,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:18,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:04:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:18,858 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-18 20:04:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:18,878 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-12-18 20:04:18,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:04:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 20:04:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:18,879 INFO L225 Difference]: With dead ends: 61 [2021-12-18 20:04:18,879 INFO L226 Difference]: Without dead ends: 61 [2021-12-18 20:04:18,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:18,880 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:18,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-18 20:04:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-18 20:04:18,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.553191489361702) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-12-18 20:04:18,890 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2021-12-18 20:04:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:18,891 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-12-18 20:04:18,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-18 20:04:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-12-18 20:04:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-18 20:04:18,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:18,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:18,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 20:04:18,892 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:18,893 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-18 20:04:18,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:18,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187028155] [2021-12-18 20:04:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:18,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:18,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187028155] [2021-12-18 20:04:18,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187028155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:18,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:18,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:04:18,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364632520] [2021-12-18 20:04:18,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:18,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:04:18,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:04:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:04:18,987 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-12-18 20:04:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:19,077 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-12-18 20:04:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:04:19,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-18 20:04:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:19,079 INFO L225 Difference]: With dead ends: 94 [2021-12-18 20:04:19,079 INFO L226 Difference]: Without dead ends: 94 [2021-12-18 20:04:19,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:04:19,080 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:19,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-18 20:04:19,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-12-18 20:04:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 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) [2021-12-18 20:04:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-18 20:04:19,083 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2021-12-18 20:04:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:19,084 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-18 20:04:19,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2021-12-18 20:04:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-18 20:04:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-18 20:04:19,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:19,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:19,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-18 20:04:19,085 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-18 20:04:19,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:19,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857901927] [2021-12-18 20:04:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:19,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:19,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857901927] [2021-12-18 20:04:19,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857901927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:19,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:19,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:04:19,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87261987] [2021-12-18 20:04:19,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:19,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:19,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:19,150 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:19,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:19,169 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-12-18 20:04:19,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:19,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-18 20:04:19,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:19,170 INFO L225 Difference]: With dead ends: 62 [2021-12-18 20:04:19,170 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 20:04:19,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:19,171 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:19,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 20:04:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-18 20:04:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.530612244897959) internal successors, (75), 61 states have internal predecessors, (75), 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) [2021-12-18 20:04:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-12-18 20:04:19,176 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2021-12-18 20:04:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:19,177 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-12-18 20:04:19,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-12-18 20:04:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-18 20:04:19,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:19,179 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:19,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 20:04:19,179 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:19,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-18 20:04:19,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:19,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085748548] [2021-12-18 20:04:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:19,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:19,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085748548] [2021-12-18 20:04:19,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085748548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447666070] [2021-12-18 20:04:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:19,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:19,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:19,284 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) [2021-12-18 20:04:19,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 20:04:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:19,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-18 20:04:19,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:19,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:19,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:19,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:19,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447666070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:19,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:19,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-18 20:04:19,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418279273] [2021-12-18 20:04:19,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:19,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:04:19,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:19,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:04:19,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:04:19,767 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:19,909 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2021-12-18 20:04:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:04:19,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-18 20:04:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:19,910 INFO L225 Difference]: With dead ends: 143 [2021-12-18 20:04:19,910 INFO L226 Difference]: Without dead ends: 143 [2021-12-18 20:04:19,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-18 20:04:19,912 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 235 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:19,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 256 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-18 20:04:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 57. [2021-12-18 20:04:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 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) [2021-12-18 20:04:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-18 20:04:19,922 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2021-12-18 20:04:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:19,922 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-18 20:04:19,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-18 20:04:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 20:04:19,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:19,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:19,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-18 20:04:20,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:20,143 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-12-18 20:04:20,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181187025] [2021-12-18 20:04:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:20,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:20,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:20,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181187025] [2021-12-18 20:04:20,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181187025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:20,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:20,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 20:04:20,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490628630] [2021-12-18 20:04:20,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:20,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:04:20,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:20,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:04:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:04:20,188 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-18 20:04:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:20,233 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-12-18 20:04:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:04:20,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2021-12-18 20:04:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:20,235 INFO L225 Difference]: With dead ends: 81 [2021-12-18 20:04:20,235 INFO L226 Difference]: Without dead ends: 81 [2021-12-18 20:04:20,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:04:20,236 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:20,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 65 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-18 20:04:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2021-12-18 20:04:20,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.5) internal successors, (69), 57 states have internal predecessors, (69), 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) [2021-12-18 20:04:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-18 20:04:20,239 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2021-12-18 20:04:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:20,239 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-18 20:04:20,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-12-18 20:04:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-18 20:04:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-18 20:04:20,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:20,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:20,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-18 20:04:20,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-18 20:04:20,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:20,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12536315] [2021-12-18 20:04:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:20,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:20,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:20,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12536315] [2021-12-18 20:04:20,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12536315] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:20,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:20,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:04:20,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253304046] [2021-12-18 20:04:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:20,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:20,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:20,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:20,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:20,267 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:04:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:20,291 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-18 20:04:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-12-18 20:04:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:20,292 INFO L225 Difference]: With dead ends: 57 [2021-12-18 20:04:20,292 INFO L226 Difference]: Without dead ends: 57 [2021-12-18 20:04:20,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:04:20,293 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:20,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-18 20:04:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-12-18 20:04:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 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) [2021-12-18 20:04:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-12-18 20:04:20,295 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2021-12-18 20:04:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:20,295 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-12-18 20:04:20,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-12-18 20:04:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-12-18 20:04:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-18 20:04:20,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:20,296 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:20,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 20:04:20,296 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:20,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-18 20:04:20,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:20,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242719227] [2021-12-18 20:04:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:20,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:20,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242719227] [2021-12-18 20:04:20,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242719227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082767796] [2021-12-18 20:04:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:20,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:20,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:20,350 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) [2021-12-18 20:04:20,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 20:04:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:20,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 20:04:20,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:20,428 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:20,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:20,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:20,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082767796] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:20,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:20,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-18 20:04:20,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539989670] [2021-12-18 20:04:20,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:20,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:04:20,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:04:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:04:20,650 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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) [2021-12-18 20:04:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:20,778 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2021-12-18 20:04:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 20:04:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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 13 [2021-12-18 20:04:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:20,779 INFO L225 Difference]: With dead ends: 115 [2021-12-18 20:04:20,779 INFO L226 Difference]: Without dead ends: 115 [2021-12-18 20:04:20,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:04:20,780 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 269 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:20,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 210 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-18 20:04:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 54. [2021-12-18 20:04:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 53 states have internal predecessors, (63), 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) [2021-12-18 20:04:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-18 20:04:20,782 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 13 [2021-12-18 20:04:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:20,782 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-18 20:04:20,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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) [2021-12-18 20:04:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-18 20:04:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 20:04:20,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:20,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:20,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:20,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-18 20:04:20,983 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash 172811107, now seen corresponding path program 1 times [2021-12-18 20:04:20,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:20,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234348080] [2021-12-18 20:04:20,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:20,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234348080] [2021-12-18 20:04:21,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234348080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,007 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:04:21,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634261302] [2021-12-18 20:04:21,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:04:21,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:04:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:04:21,008 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-12-18 20:04:21,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,043 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-12-18 20:04:21,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:04:21,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-12-18 20:04:21,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,044 INFO L225 Difference]: With dead ends: 54 [2021-12-18 20:04:21,044 INFO L226 Difference]: Without dead ends: 54 [2021-12-18 20:04:21,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:04:21,045 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-18 20:04:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2021-12-18 20:04:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 50 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) [2021-12-18 20:04:21,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-12-18 20:04:21,047 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2021-12-18 20:04:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,047 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-12-18 20:04:21,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-12-18 20:04:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-12-18 20:04:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-18 20:04:21,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-18 20:04:21,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash 172811108, now seen corresponding path program 1 times [2021-12-18 20:04:21,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932815125] [2021-12-18 20:04:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932815125] [2021-12-18 20:04:21,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932815125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:04:21,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141374622] [2021-12-18 20:04:21,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:04:21,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:04:21,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:04:21,098 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-12-18 20:04:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,156 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-12-18 20:04:21,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 20:04:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 14 [2021-12-18 20:04:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,157 INFO L225 Difference]: With dead ends: 69 [2021-12-18 20:04:21,157 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 20:04:21,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:04:21,158 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 208 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 75 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 20:04:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2021-12-18 20:04:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2021-12-18 20:04:21,160 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 14 [2021-12-18 20:04:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,160 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2021-12-18 20:04:21,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-12-18 20:04:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2021-12-18 20:04:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-18 20:04:21,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 20:04:21,161 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1432273078, now seen corresponding path program 1 times [2021-12-18 20:04:21,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673084770] [2021-12-18 20:04:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673084770] [2021-12-18 20:04:21,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673084770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:04:21,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612874785] [2021-12-18 20:04:21,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 20:04:21,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 20:04:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:21,231 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,246 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2021-12-18 20:04:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 20:04:21,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-18 20:04:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,246 INFO L225 Difference]: With dead ends: 58 [2021-12-18 20:04:21,247 INFO L226 Difference]: Without dead ends: 55 [2021-12-18 20:04:21,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 20:04:21,247 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-18 20:04:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-18 20:04:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 54 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) [2021-12-18 20:04:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-12-18 20:04:21,249 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 16 [2021-12-18 20:04:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-12-18 20:04:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-12-18 20:04:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:04:21,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,250 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-18 20:04:21,250 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954455, now seen corresponding path program 1 times [2021-12-18 20:04:21,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250797206] [2021-12-18 20:04:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250797206] [2021-12-18 20:04:21,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250797206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 20:04:21,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785790540] [2021-12-18 20:04:21,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 20:04:21,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 20:04:21,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 20:04:21,275 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,303 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2021-12-18 20:04:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 20:04:21,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 20:04:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,304 INFO L225 Difference]: With dead ends: 55 [2021-12-18 20:04:21,304 INFO L226 Difference]: Without dead ends: 55 [2021-12-18 20:04:21,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:04:21,305 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 54 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-18 20:04:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-12-18 20:04:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 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) [2021-12-18 20:04:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-12-18 20:04:21,306 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 18 [2021-12-18 20:04:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,307 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-12-18 20:04:21,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-12-18 20:04:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:04:21,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,307 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-18 20:04:21,308 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954454, now seen corresponding path program 1 times [2021-12-18 20:04:21,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367898745] [2021-12-18 20:04:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367898745] [2021-12-18 20:04:21,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367898745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:04:21,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746182859] [2021-12-18 20:04:21,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:04:21,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:04:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:04:21,352 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,424 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2021-12-18 20:04:21,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:04:21,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 20:04:21,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,425 INFO L225 Difference]: With dead ends: 80 [2021-12-18 20:04:21,426 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 20:04:21,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:04:21,426 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 151 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 65 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:21,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 20:04:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-12-18 20:04:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-18 20:04:21,428 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2021-12-18 20:04:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,429 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-18 20:04:21,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-18 20:04:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-18 20:04:21,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-18 20:04:21,430 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2001945381, now seen corresponding path program 1 times [2021-12-18 20:04:21,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093826156] [2021-12-18 20:04:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093826156] [2021-12-18 20:04:21,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093826156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-18 20:04:21,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165624495] [2021-12-18 20:04:21,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-18 20:04:21,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-18 20:04:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-18 20:04:21,448 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,452 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-12-18 20:04:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-18 20:04:21,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-18 20:04:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,453 INFO L225 Difference]: With dead ends: 62 [2021-12-18 20:04:21,453 INFO L226 Difference]: Without dead ends: 62 [2021-12-18 20:04:21,453 INFO L932 BasicCegarLoop]: 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 [2021-12-18 20:04:21,454 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-18 20:04:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-18 20:04:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-12-18 20:04:21,456 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 18 [2021-12-18 20:04:21,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,456 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-12-18 20:04:21,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,456 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-12-18 20:04:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-18 20:04:21,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-18 20:04:21,457 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 275803338, now seen corresponding path program 1 times [2021-12-18 20:04:21,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878950291] [2021-12-18 20:04:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878950291] [2021-12-18 20:04:21,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878950291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-18 20:04:21,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145726551] [2021-12-18 20:04:21,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-18 20:04:21,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-18 20:04:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-18 20:04:21,487 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-12-18 20:04:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,522 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-12-18 20:04:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:04:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20 [2021-12-18 20:04:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,523 INFO L225 Difference]: With dead ends: 66 [2021-12-18 20:04:21,523 INFO L226 Difference]: Without dead ends: 63 [2021-12-18 20:04:21,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:04:21,524 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-18 20:04:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-12-18 20:04:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:21,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-12-18 20:04:21,525 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 20 [2021-12-18 20:04:21,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,526 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-12-18 20:04:21,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-12-18 20:04:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-12-18 20:04:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 20:04:21,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-18 20:04:21,527 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash -309239812, now seen corresponding path program 1 times [2021-12-18 20:04:21,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956503073] [2021-12-18 20:04:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:21,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:21,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956503073] [2021-12-18 20:04:21,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956503073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:21,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:21,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-18 20:04:21,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17345718] [2021-12-18 20:04:21,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:21,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-18 20:04:21,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:21,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-18 20:04:21,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-18 20:04:21,659 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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) [2021-12-18 20:04:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:21,916 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2021-12-18 20:04:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-18 20:04:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 20:04:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:21,917 INFO L225 Difference]: With dead ends: 112 [2021-12-18 20:04:21,917 INFO L226 Difference]: Without dead ends: 112 [2021-12-18 20:04:21,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:04:21,917 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 146 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:21,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 253 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-18 20:04:21,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2021-12-18 20:04:21,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 80 states have internal predecessors, (92), 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) [2021-12-18 20:04:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2021-12-18 20:04:21,919 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 21 [2021-12-18 20:04:21,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:21,919 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2021-12-18 20:04:21,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 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) [2021-12-18 20:04:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2021-12-18 20:04:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-18 20:04:21,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:21,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:21,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-18 20:04:21,920 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1998183554, now seen corresponding path program 1 times [2021-12-18 20:04:21,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030661409] [2021-12-18 20:04:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:21,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:22,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030661409] [2021-12-18 20:04:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030661409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:22,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:22,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-18 20:04:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904349919] [2021-12-18 20:04:22,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:22,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-18 20:04:22,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-18 20:04:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:04:22,108 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-12-18 20:04:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:22,410 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2021-12-18 20:04:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:04:22,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-18 20:04:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:22,411 INFO L225 Difference]: With dead ends: 139 [2021-12-18 20:04:22,411 INFO L226 Difference]: Without dead ends: 139 [2021-12-18 20:04:22,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-12-18 20:04:22,412 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 139 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:22,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 253 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-18 20:04:22,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 83. [2021-12-18 20:04:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 82 states have internal predecessors, (96), 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) [2021-12-18 20:04:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-12-18 20:04:22,415 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2021-12-18 20:04:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:22,416 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-12-18 20:04:22,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2021-12-18 20:04:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-12-18 20:04:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 20:04:22,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:22,417 INFO L514 BasicCegarLoop]: 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] [2021-12-18 20:04:22,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-18 20:04:22,417 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash -826750037, now seen corresponding path program 1 times [2021-12-18 20:04:22,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:22,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062570845] [2021-12-18 20:04:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:22,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:22,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:22,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062570845] [2021-12-18 20:04:22,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062570845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:22,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:22,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 20:04:22,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339287493] [2021-12-18 20:04:22,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:22,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 20:04:22,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 20:04:22,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 20:04:22,499 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:22,545 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-12-18 20:04:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 20:04:22,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 20:04:22,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:22,546 INFO L225 Difference]: With dead ends: 95 [2021-12-18 20:04:22,547 INFO L226 Difference]: Without dead ends: 78 [2021-12-18 20:04:22,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-18 20:04:22,548 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:22,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 147 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-18 20:04:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-18 20:04:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 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) [2021-12-18 20:04:22,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2021-12-18 20:04:22,550 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2021-12-18 20:04:22,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:22,551 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2021-12-18 20:04:22,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:22,551 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2021-12-18 20:04:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-18 20:04:22,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:22,552 INFO L514 BasicCegarLoop]: 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] [2021-12-18 20:04:22,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-18 20:04:22,552 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:22,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:22,552 INFO L85 PathProgramCache]: Analyzing trace with hash -404048211, now seen corresponding path program 1 times [2021-12-18 20:04:22,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:22,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597377731] [2021-12-18 20:04:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:22,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:22,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:22,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597377731] [2021-12-18 20:04:22,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597377731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:22,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:22,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 20:04:22,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848486582] [2021-12-18 20:04:22,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:22,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 20:04:22,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 20:04:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-18 20:04:22,662 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:22,720 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-12-18 20:04:22,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:04:22,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-18 20:04:22,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:22,721 INFO L225 Difference]: With dead ends: 77 [2021-12-18 20:04:22,721 INFO L226 Difference]: Without dead ends: 65 [2021-12-18 20:04:22,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:04:22,722 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 56 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:22,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 153 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-18 20:04:22,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-12-18 20:04:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 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) [2021-12-18 20:04:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-12-18 20:04:22,724 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2021-12-18 20:04:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:22,724 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-12-18 20:04:22,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-12-18 20:04:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 20:04:22,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:22,725 INFO L514 BasicCegarLoop]: 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] [2021-12-18 20:04:22,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-18 20:04:22,726 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:22,726 INFO L85 PathProgramCache]: Analyzing trace with hash -481506431, now seen corresponding path program 1 times [2021-12-18 20:04:22,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:22,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991384249] [2021-12-18 20:04:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:22,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:22,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:22,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991384249] [2021-12-18 20:04:22,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991384249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:22,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:22,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 20:04:22,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654026484] [2021-12-18 20:04:22,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:22,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 20:04:22,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:22,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 20:04:22,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 20:04:22,819 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:22,912 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-12-18 20:04:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:04:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 20:04:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:22,913 INFO L225 Difference]: With dead ends: 67 [2021-12-18 20:04:22,913 INFO L226 Difference]: Without dead ends: 51 [2021-12-18 20:04:22,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-12-18 20:04:22,914 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:22,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 185 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-18 20:04:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-12-18 20:04:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-18 20:04:22,916 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2021-12-18 20:04:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:22,916 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-18 20:04:22,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-18 20:04:22,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-18 20:04:22,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:22,918 INFO L514 BasicCegarLoop]: 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] [2021-12-18 20:04:22,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-18 20:04:22,918 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash -262651713, now seen corresponding path program 1 times [2021-12-18 20:04:22,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:22,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667188190] [2021-12-18 20:04:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:22,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:23,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667188190] [2021-12-18 20:04:23,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667188190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 20:04:23,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 20:04:23,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-18 20:04:23,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452924336] [2021-12-18 20:04:23,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 20:04:23,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-18 20:04:23,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-18 20:04:23,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-18 20:04:23,038 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:23,159 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2021-12-18 20:04:23,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:04:23,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-18 20:04:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:23,160 INFO L225 Difference]: With dead ends: 63 [2021-12-18 20:04:23,160 INFO L226 Difference]: Without dead ends: 55 [2021-12-18 20:04:23,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-12-18 20:04:23,165 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:23,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 190 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 20:04:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-18 20:04:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-12-18 20:04:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 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) [2021-12-18 20:04:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-12-18 20:04:23,168 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 25 [2021-12-18 20:04:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:23,168 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-12-18 20:04:23,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-12-18 20:04:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-18 20:04:23,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:23,169 INFO L514 BasicCegarLoop]: 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] [2021-12-18 20:04:23,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-18 20:04:23,170 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash 838689666, now seen corresponding path program 1 times [2021-12-18 20:04:23,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:23,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156790795] [2021-12-18 20:04:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:23,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:23,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156790795] [2021-12-18 20:04:23,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156790795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:23,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507442281] [2021-12-18 20:04:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:23,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:23,296 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) [2021-12-18 20:04:23,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 20:04:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:23,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-18 20:04:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:23,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-18 20:04:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:23,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507442281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:23,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:23,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-12-18 20:04:23,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789201729] [2021-12-18 20:04:23,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:23,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 20:04:23,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:23,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 20:04:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:04:23,598 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 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) [2021-12-18 20:04:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:23,830 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-12-18 20:04:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-18 20:04:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 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 [2021-12-18 20:04:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:23,831 INFO L225 Difference]: With dead ends: 73 [2021-12-18 20:04:23,831 INFO L226 Difference]: Without dead ends: 69 [2021-12-18 20:04:23,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-12-18 20:04:23,832 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 400 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:23,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 159 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-18 20:04:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2021-12-18 20:04:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 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) [2021-12-18 20:04:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-18 20:04:23,834 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2021-12-18 20:04:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:23,835 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-18 20:04:23,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 20 states have internal predecessors, (65), 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) [2021-12-18 20:04:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-18 20:04:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-18 20:04:23,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:23,836 INFO L514 BasicCegarLoop]: 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] [2021-12-18 20:04:23,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:24,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:24,051 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1473116751, now seen corresponding path program 1 times [2021-12-18 20:04:24,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:24,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978349710] [2021-12-18 20:04:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:24,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:24,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978349710] [2021-12-18 20:04:24,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978349710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094181504] [2021-12-18 20:04:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:24,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:24,111 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) [2021-12-18 20:04:24,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 20:04:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 20:04:24,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:24,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:24,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:24,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:24,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:24,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094181504] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:24,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:24,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-18 20:04:24,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447044921] [2021-12-18 20:04:24,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:24,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-18 20:04:24,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-18 20:04:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-18 20:04:24,533 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 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) [2021-12-18 20:04:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:24,723 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2021-12-18 20:04:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-18 20:04:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 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 31 [2021-12-18 20:04:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:24,724 INFO L225 Difference]: With dead ends: 86 [2021-12-18 20:04:24,725 INFO L226 Difference]: Without dead ends: 86 [2021-12-18 20:04:24,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-18 20:04:24,726 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 249 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:24,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 139 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-18 20:04:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-12-18 20:04:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 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) [2021-12-18 20:04:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-12-18 20:04:24,728 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 31 [2021-12-18 20:04:24,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:24,728 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-12-18 20:04:24,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 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) [2021-12-18 20:04:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-12-18 20:04:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-18 20:04:24,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:24,729 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:04:24,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-18 20:04:24,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-18 20:04:24,939 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1707334280, now seen corresponding path program 1 times [2021-12-18 20:04:24,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:24,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612401407] [2021-12-18 20:04:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:24,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:25,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:25,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612401407] [2021-12-18 20:04:25,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612401407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:25,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472283348] [2021-12-18 20:04:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:25,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:25,013 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) [2021-12-18 20:04:25,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-18 20:04:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:25,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 20:04:25,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:25,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:25,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:25,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:25,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472283348] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:25,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:25,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2021-12-18 20:04:25,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613308662] [2021-12-18 20:04:25,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:25,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 20:04:25,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:25,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 20:04:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:04:25,440 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 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) [2021-12-18 20:04:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:25,771 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-12-18 20:04:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:04:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 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 33 [2021-12-18 20:04:25,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:25,772 INFO L225 Difference]: With dead ends: 80 [2021-12-18 20:04:25,772 INFO L226 Difference]: Without dead ends: 80 [2021-12-18 20:04:25,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-12-18 20:04:25,773 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 262 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:25,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 170 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:25,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-18 20:04:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2021-12-18 20:04:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2021-12-18 20:04:25,774 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 33 [2021-12-18 20:04:25,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:25,774 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2021-12-18 20:04:25,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 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) [2021-12-18 20:04:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2021-12-18 20:04:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-18 20:04:25,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:25,775 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:04:25,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:25,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-18 20:04:25,984 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:25,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2102124002, now seen corresponding path program 2 times [2021-12-18 20:04:25,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:25,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962208686] [2021-12-18 20:04:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:25,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:26,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:26,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962208686] [2021-12-18 20:04:26,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962208686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626985515] [2021-12-18 20:04:26,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:26,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:26,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:26,240 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) [2021-12-18 20:04:26,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-18 20:04:26,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:26,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-18 20:04:26,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:26,398 INFO L388 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 14 treesize of output 10 [2021-12-18 20:04:26,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:26,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 20:04:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:26,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:27,399 INFO L388 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 15 treesize of output 13 [2021-12-18 20:04:27,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 11 [2021-12-18 20:04:27,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:04:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:27,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626985515] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:27,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:27,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 36 [2021-12-18 20:04:27,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808447043] [2021-12-18 20:04:27,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:27,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 20:04:27,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 20:04:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2021-12-18 20:04:27,438 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 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) [2021-12-18 20:04:28,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:28,010 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2021-12-18 20:04:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 20:04:28,011 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 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 36 [2021-12-18 20:04:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:28,012 INFO L225 Difference]: With dead ends: 108 [2021-12-18 20:04:28,012 INFO L226 Difference]: Without dead ends: 108 [2021-12-18 20:04:28,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=309, Invalid=2553, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 20:04:28,013 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 138 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:28,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 312 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 412 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2021-12-18 20:04:28,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-18 20:04:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2021-12-18 20:04:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 96 states have internal predecessors, (110), 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) [2021-12-18 20:04:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2021-12-18 20:04:28,016 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 36 [2021-12-18 20:04:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:28,016 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2021-12-18 20:04:28,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 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) [2021-12-18 20:04:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2021-12-18 20:04:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-18 20:04:28,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:28,020 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:04:28,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:28,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-18 20:04:28,221 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1563569052, now seen corresponding path program 1 times [2021-12-18 20:04:28,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:28,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794635698] [2021-12-18 20:04:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:28,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:28,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794635698] [2021-12-18 20:04:28,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794635698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:28,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241166465] [2021-12-18 20:04:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:28,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:28,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:28,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:28,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-18 20:04:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 20:04:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:28,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:28,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:28,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:28,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:28,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241166465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:28,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:28,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2021-12-18 20:04:28,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077222904] [2021-12-18 20:04:28,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:28,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-18 20:04:28,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-18 20:04:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-18 20:04:28,795 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 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) [2021-12-18 20:04:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:29,242 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-12-18 20:04:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 20:04:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-18 20:04:29,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:29,243 INFO L225 Difference]: With dead ends: 124 [2021-12-18 20:04:29,243 INFO L226 Difference]: Without dead ends: 124 [2021-12-18 20:04:29,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:04:29,244 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 351 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:29,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 171 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-18 20:04:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-18 20:04:29,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2021-12-18 20:04:29,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 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) [2021-12-18 20:04:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2021-12-18 20:04:29,247 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 37 [2021-12-18 20:04:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:29,247 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2021-12-18 20:04:29,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 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) [2021-12-18 20:04:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2021-12-18 20:04:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-18 20:04:29,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:29,248 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:04:29,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:29,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:29,448 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2117126329, now seen corresponding path program 2 times [2021-12-18 20:04:29,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:29,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645325961] [2021-12-18 20:04:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:29,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:29,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:29,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645325961] [2021-12-18 20:04:29,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645325961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:29,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012610195] [2021-12-18 20:04:29,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:29,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:29,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:29,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:29,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-18 20:04:29,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:29,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 20:04:29,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:29,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:29,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:04:29,826 INFO L388 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 14 treesize of output 16 [2021-12-18 20:04:29,908 INFO L388 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 15 treesize of output 7 [2021-12-18 20:04:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:29,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:30,005 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_390 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_390) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))) is different from false [2021-12-18 20:04:30,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:30,012 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:04:30,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:30,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:04:30,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:04:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:30,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012610195] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:30,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:30,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 21 [2021-12-18 20:04:30,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808180170] [2021-12-18 20:04:30,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:30,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-18 20:04:30,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:30,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-18 20:04:30,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=321, Unknown=1, NotChecked=36, Total=420 [2021-12-18 20:04:30,164 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:30,327 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2021-12-18 20:04:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:04:30,328 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-18 20:04:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:30,328 INFO L225 Difference]: With dead ends: 104 [2021-12-18 20:04:30,328 INFO L226 Difference]: Without dead ends: 75 [2021-12-18 20:04:30,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=497, Unknown=1, NotChecked=46, Total=650 [2021-12-18 20:04:30,329 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:30,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 256 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 232 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-12-18 20:04:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-18 20:04:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-18 20:04:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.173913043478261) internal successors, (81), 71 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) [2021-12-18 20:04:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-12-18 20:04:30,330 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 42 [2021-12-18 20:04:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:30,330 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-12-18 20:04:30,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-12-18 20:04:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-18 20:04:30,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:30,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-18 20:04:30,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:30,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-18 20:04:30,531 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:30,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1763674815, now seen corresponding path program 2 times [2021-12-18 20:04:30,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:30,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658083499] [2021-12-18 20:04:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:30,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:30,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658083499] [2021-12-18 20:04:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658083499] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919909486] [2021-12-18 20:04:30,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:30,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:30,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:30,627 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:30,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-18 20:04:30,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:30,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:30,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-18 20:04:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:30,762 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:30,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:30,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:31,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919909486] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:31,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:31,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2021-12-18 20:04:31,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083212757] [2021-12-18 20:04:31,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:31,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 20:04:31,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 20:04:31,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:04:31,157 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 25 states, 25 states have (on average 4.28) internal successors, (107), 25 states have internal predecessors, (107), 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) [2021-12-18 20:04:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:32,065 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2021-12-18 20:04:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 20:04:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 25 states have internal predecessors, (107), 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 44 [2021-12-18 20:04:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:32,067 INFO L225 Difference]: With dead ends: 154 [2021-12-18 20:04:32,067 INFO L226 Difference]: Without dead ends: 153 [2021-12-18 20:04:32,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=555, Invalid=2097, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 20:04:32,068 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 578 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:32,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 290 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:04:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-18 20:04:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-12-18 20:04:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.152542372881356) internal successors, (136), 120 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2021-12-18 20:04:32,071 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 44 [2021-12-18 20:04:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:32,072 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2021-12-18 20:04:32,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.28) internal successors, (107), 25 states have internal predecessors, (107), 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) [2021-12-18 20:04:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2021-12-18 20:04:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-18 20:04:32,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:32,073 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:04:32,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:32,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:32,287 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1310015382, now seen corresponding path program 3 times [2021-12-18 20:04:32,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713507364] [2021-12-18 20:04:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:32,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:32,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713507364] [2021-12-18 20:04:32,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713507364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:32,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259016858] [2021-12-18 20:04:32,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:32,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:32,392 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:32,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-18 20:04:32,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 20:04:32,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 20:04:32,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:32,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:32,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 5 [2021-12-18 20:04:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:32,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259016858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:32,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:32,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2021-12-18 20:04:32,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205271871] [2021-12-18 20:04:32,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:32,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-18 20:04:32,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:32,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-18 20:04:32,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-12-18 20:04:32,898 INFO L87 Difference]: Start difference. First operand 121 states and 136 transitions. Second operand has 24 states, 23 states have (on average 4.956521739130435) internal successors, (114), 24 states have internal predecessors, (114), 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) [2021-12-18 20:04:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:33,207 INFO L93 Difference]: Finished difference Result 213 states and 236 transitions. [2021-12-18 20:04:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:04:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.956521739130435) internal successors, (114), 24 states have internal predecessors, (114), 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 46 [2021-12-18 20:04:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:33,208 INFO L225 Difference]: With dead ends: 213 [2021-12-18 20:04:33,208 INFO L226 Difference]: Without dead ends: 213 [2021-12-18 20:04:33,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2021-12-18 20:04:33,209 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 612 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:33,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 191 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:04:33,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-18 20:04:33,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 158. [2021-12-18 20:04:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 155 states have (on average 1.1612903225806452) internal successors, (180), 157 states have internal predecessors, (180), 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) [2021-12-18 20:04:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2021-12-18 20:04:33,213 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 46 [2021-12-18 20:04:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:33,214 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2021-12-18 20:04:33,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.956521739130435) internal successors, (114), 24 states have internal predecessors, (114), 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) [2021-12-18 20:04:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2021-12-18 20:04:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-18 20:04:33,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:33,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-18 20:04:33,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-18 20:04:33,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-18 20:04:33,426 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash 532688685, now seen corresponding path program 1 times [2021-12-18 20:04:33,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:33,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957201536] [2021-12-18 20:04:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:33,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:33,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957201536] [2021-12-18 20:04:33,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957201536] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636584285] [2021-12-18 20:04:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:33,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:33,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:33,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-18 20:04:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:33,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 20:04:33,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:33,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:33,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:33,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:34,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636584285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:34,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:34,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-18 20:04:34,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621609623] [2021-12-18 20:04:34,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:34,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 20:04:34,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:34,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 20:04:34,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:04:34,249 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 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) [2021-12-18 20:04:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:34,713 INFO L93 Difference]: Finished difference Result 190 states and 208 transitions. [2021-12-18 20:04:34,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 20:04:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 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 48 [2021-12-18 20:04:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:34,714 INFO L225 Difference]: With dead ends: 190 [2021-12-18 20:04:34,714 INFO L226 Difference]: Without dead ends: 190 [2021-12-18 20:04:34,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:04:34,715 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 481 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:34,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 218 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:04:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-18 20:04:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 162. [2021-12-18 20:04:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.150943396226415) internal successors, (183), 161 states have internal predecessors, (183), 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) [2021-12-18 20:04:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2021-12-18 20:04:34,718 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 48 [2021-12-18 20:04:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:34,719 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2021-12-18 20:04:34,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 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) [2021-12-18 20:04:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2021-12-18 20:04:34,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:04:34,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:34,720 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-18 20:04:34,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-18 20:04:34,931 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:34,932 INFO L85 PathProgramCache]: Analyzing trace with hash -575516839, now seen corresponding path program 1 times [2021-12-18 20:04:34,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:34,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521970550] [2021-12-18 20:04:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:34,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:35,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521970550] [2021-12-18 20:04:35,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521970550] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:35,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022350488] [2021-12-18 20:04:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:35,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:35,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:35,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:35,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-18 20:04:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 20:04:35,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:35,556 INFO L388 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 14 treesize of output 10 [2021-12-18 20:04:36,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:04:36,139 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:04:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 20:04:36,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:36,460 INFO L388 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 15 treesize of output 13 [2021-12-18 20:04:36,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:04:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 20:04:36,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022350488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:36,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:36,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 42 [2021-12-18 20:04:36,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003188801] [2021-12-18 20:04:36,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:36,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 20:04:36,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 20:04:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1601, Unknown=0, NotChecked=0, Total=1722 [2021-12-18 20:04:36,682 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 states have internal predecessors, (121), 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) [2021-12-18 20:04:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:37,836 INFO L93 Difference]: Finished difference Result 203 states and 221 transitions. [2021-12-18 20:04:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-18 20:04:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 states have internal predecessors, (121), 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 [2021-12-18 20:04:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:37,838 INFO L225 Difference]: With dead ends: 203 [2021-12-18 20:04:37,838 INFO L226 Difference]: Without dead ends: 191 [2021-12-18 20:04:37,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=428, Invalid=4542, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 20:04:37,839 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:37,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 473 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 490 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2021-12-18 20:04:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-18 20:04:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 140. [2021-12-18 20:04:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 137 states have (on average 1.1313868613138687) internal successors, (155), 139 states have internal predecessors, (155), 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) [2021-12-18 20:04:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2021-12-18 20:04:37,842 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 51 [2021-12-18 20:04:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:37,842 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2021-12-18 20:04:37,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 42 states have internal predecessors, (121), 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) [2021-12-18 20:04:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2021-12-18 20:04:37,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-18 20:04:37,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:37,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:37,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:38,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-18 20:04:38,043 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:38,044 INFO L85 PathProgramCache]: Analyzing trace with hash 629169992, now seen corresponding path program 3 times [2021-12-18 20:04:38,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:38,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850644182] [2021-12-18 20:04:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:38,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:38,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:38,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850644182] [2021-12-18 20:04:38,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850644182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:38,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745467879] [2021-12-18 20:04:38,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:38,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:38,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:38,613 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:38,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-18 20:04:38,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 20:04:38,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 20:04:38,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:38,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:04:38,988 INFO L388 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 17 treesize of output 19 [2021-12-18 20:04:39,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:04:39,856 INFO L354 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2021-12-18 20:04:39,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-18 20:04:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:39,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:40,498 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_556 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.base| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_48| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_556))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (< |v_ULTIMATE.start_substring_~ps2~0#1.offset_48| 0) (= 0 .cse0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps2~0#1.offset_48|) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_48| 2)))))))) is different from false [2021-12-18 20:04:40,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:40,510 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:04:40,523 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:40,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:04:40,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:40,538 INFO L388 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 68 treesize of output 64 [2021-12-18 20:04:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:41,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745467879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:41,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:41,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 54 [2021-12-18 20:04:41,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354014015] [2021-12-18 20:04:41,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:41,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 20:04:41,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:41,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 20:04:41,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2601, Unknown=1, NotChecked=102, Total=2862 [2021-12-18 20:04:41,303 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 54 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 states have internal predecessors, (134), 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) [2021-12-18 20:04:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:42,665 INFO L93 Difference]: Finished difference Result 229 states and 251 transitions. [2021-12-18 20:04:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 20:04:42,665 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 states have internal predecessors, (134), 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 [2021-12-18 20:04:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:42,666 INFO L225 Difference]: With dead ends: 229 [2021-12-18 20:04:42,666 INFO L226 Difference]: Without dead ends: 226 [2021-12-18 20:04:42,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=411, Invalid=5598, Unknown=1, NotChecked=152, Total=6162 [2021-12-18 20:04:42,667 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:42,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 783 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 587 Invalid, 0 Unknown, 375 Unchecked, 0.2s Time] [2021-12-18 20:04:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-12-18 20:04:42,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2021-12-18 20:04:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 186 states have (on average 1.1290322580645162) internal successors, (210), 188 states have internal predecessors, (210), 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) [2021-12-18 20:04:42,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 210 transitions. [2021-12-18 20:04:42,671 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 210 transitions. Word has length 51 [2021-12-18 20:04:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:42,672 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 210 transitions. [2021-12-18 20:04:42,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 states have internal predecessors, (134), 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) [2021-12-18 20:04:42,672 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 210 transitions. [2021-12-18 20:04:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 20:04:42,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:42,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-18 20:04:42,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:42,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-18 20:04:42,887 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2051822684, now seen corresponding path program 2 times [2021-12-18 20:04:42,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:42,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614603874] [2021-12-18 20:04:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:42,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 20:04:43,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614603874] [2021-12-18 20:04:43,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614603874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:43,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784671724] [2021-12-18 20:04:43,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:43,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:43,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:43,005 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:43,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-18 20:04:43,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:43,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:43,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-18 20:04:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 20:04:43,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:43,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-18 20:04:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 20:04:43,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784671724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:43,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:43,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2021-12-18 20:04:43,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277136247] [2021-12-18 20:04:43,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:43,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 20:04:43,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:43,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 20:04:43,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-12-18 20:04:43,469 INFO L87 Difference]: Start difference. First operand 189 states and 210 transitions. Second operand has 23 states, 22 states have (on average 5.318181818181818) internal successors, (117), 23 states have internal predecessors, (117), 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) [2021-12-18 20:04:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:43,847 INFO L93 Difference]: Finished difference Result 266 states and 293 transitions. [2021-12-18 20:04:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 20:04:43,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.318181818181818) internal successors, (117), 23 states have internal predecessors, (117), 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 55 [2021-12-18 20:04:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:43,851 INFO L225 Difference]: With dead ends: 266 [2021-12-18 20:04:43,852 INFO L226 Difference]: Without dead ends: 266 [2021-12-18 20:04:43,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-12-18 20:04:43,852 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:43,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 268 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:04:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-18 20:04:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 199. [2021-12-18 20:04:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 196 states have (on average 1.1377551020408163) internal successors, (223), 198 states have internal predecessors, (223), 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) [2021-12-18 20:04:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2021-12-18 20:04:43,856 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 55 [2021-12-18 20:04:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:43,856 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2021-12-18 20:04:43,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.318181818181818) internal successors, (117), 23 states have internal predecessors, (117), 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) [2021-12-18 20:04:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2021-12-18 20:04:43,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 20:04:43,857 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:43,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:43,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-18 20:04:44,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:44,076 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:44,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:44,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1280880373, now seen corresponding path program 4 times [2021-12-18 20:04:44,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:44,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939267618] [2021-12-18 20:04:44,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:44,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:44,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939267618] [2021-12-18 20:04:44,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939267618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:44,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326985055] [2021-12-18 20:04:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:04:44,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:44,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:44,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:44,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-18 20:04:44,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:04:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 20:04:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:44,433 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:44,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:44,619 INFO L388 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 13 treesize of output 9 [2021-12-18 20:04:44,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:04:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:04:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:04:44,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:45,275 INFO L388 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 13 treesize of output 11 [2021-12-18 20:04:45,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:04:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:04:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326985055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:45,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:45,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2021-12-18 20:04:45,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412987890] [2021-12-18 20:04:45,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 20:04:45,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 20:04:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 20:04:45,646 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 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) [2021-12-18 20:04:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:47,018 INFO L93 Difference]: Finished difference Result 253 states and 280 transitions. [2021-12-18 20:04:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 20:04:47,018 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 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 55 [2021-12-18 20:04:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:47,019 INFO L225 Difference]: With dead ends: 253 [2021-12-18 20:04:47,019 INFO L226 Difference]: Without dead ends: 250 [2021-12-18 20:04:47,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=592, Invalid=4520, Unknown=0, NotChecked=0, Total=5112 [2021-12-18 20:04:47,020 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 225 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:47,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 435 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 378 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2021-12-18 20:04:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-18 20:04:47,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 203. [2021-12-18 20:04:47,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 200 states have (on average 1.14) internal successors, (228), 202 states have internal predecessors, (228), 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) [2021-12-18 20:04:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2021-12-18 20:04:47,023 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 55 [2021-12-18 20:04:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:47,024 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2021-12-18 20:04:47,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 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) [2021-12-18 20:04:47,024 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2021-12-18 20:04:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-18 20:04:47,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:47,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:47,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:47,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-18 20:04:47,249 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -869737036, now seen corresponding path program 4 times [2021-12-18 20:04:47,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:47,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119855848] [2021-12-18 20:04:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:47,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:04:47,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119855848] [2021-12-18 20:04:47,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119855848] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457716724] [2021-12-18 20:04:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:04:47,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:47,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:47,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-18 20:04:47,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:04:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 20:04:47,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:47,755 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:47,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:47,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-18 20:04:47,992 INFO L388 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 16 treesize of output 18 [2021-12-18 20:04:48,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:48,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-18 20:04:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:48,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:48,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:48,830 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:04:48,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:48,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:04:48,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:04:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:49,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457716724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:49,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:49,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 41 [2021-12-18 20:04:49,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617071501] [2021-12-18 20:04:49,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:49,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 20:04:49,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 20:04:49,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1489, Unknown=13, NotChecked=0, Total=1640 [2021-12-18 20:04:49,258 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand has 41 states, 41 states have (on average 3.731707317073171) internal successors, (153), 41 states have internal predecessors, (153), 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) [2021-12-18 20:04:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:50,097 INFO L93 Difference]: Finished difference Result 287 states and 316 transitions. [2021-12-18 20:04:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 20:04:50,097 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.731707317073171) internal successors, (153), 41 states have internal predecessors, (153), 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 57 [2021-12-18 20:04:50,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:50,098 INFO L225 Difference]: With dead ends: 287 [2021-12-18 20:04:50,098 INFO L226 Difference]: Without dead ends: 251 [2021-12-18 20:04:50,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=376, Invalid=3151, Unknown=13, NotChecked=0, Total=3540 [2021-12-18 20:04:50,099 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:50,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 446 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 270 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2021-12-18 20:04:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-18 20:04:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 248. [2021-12-18 20:04:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 245 states have (on average 1.1224489795918366) internal successors, (275), 247 states have internal predecessors, (275), 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) [2021-12-18 20:04:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 275 transitions. [2021-12-18 20:04:50,102 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 275 transitions. Word has length 57 [2021-12-18 20:04:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:50,103 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 275 transitions. [2021-12-18 20:04:50,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.731707317073171) internal successors, (153), 41 states have internal predecessors, (153), 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) [2021-12-18 20:04:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 275 transitions. [2021-12-18 20:04:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 20:04:50,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:50,104 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2021-12-18 20:04:50,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-18 20:04:50,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-18 20:04:50,320 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:50,321 INFO L85 PathProgramCache]: Analyzing trace with hash 421187170, now seen corresponding path program 2 times [2021-12-18 20:04:50,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:50,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229765810] [2021-12-18 20:04:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:50,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:50,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:50,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229765810] [2021-12-18 20:04:50,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229765810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:50,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692309236] [2021-12-18 20:04:50,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:04:50,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:50,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:50,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-18 20:04:50,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:04:50,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:50,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-18 20:04:50,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:51,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:04:51,089 INFO L388 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 17 treesize of output 19 [2021-12-18 20:04:51,710 INFO L354 Elim1Store]: treesize reduction 41, result has 46.1 percent of original size [2021-12-18 20:04:51,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 52 [2021-12-18 20:04:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:51,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:52,009 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_708 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_708) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2)) 0) (= 0 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)))))) is different from false [2021-12-18 20:04:52,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:04:52,016 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2021-12-18 20:04:52,029 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-18 20:04:52,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2021-12-18 20:04:52,035 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 20:04:52,035 INFO L388 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 23 treesize of output 15 [2021-12-18 20:04:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:52,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692309236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:52,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:52,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 20] total 49 [2021-12-18 20:04:52,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219295972] [2021-12-18 20:04:52,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:52,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 20:04:52,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:52,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 20:04:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2100, Unknown=1, NotChecked=92, Total=2352 [2021-12-18 20:04:52,306 INFO L87 Difference]: Start difference. First operand 248 states and 275 transitions. Second operand has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 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) [2021-12-18 20:04:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:53,062 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2021-12-18 20:04:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 20:04:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-18 20:04:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:53,063 INFO L225 Difference]: With dead ends: 243 [2021-12-18 20:04:53,063 INFO L226 Difference]: Without dead ends: 180 [2021-12-18 20:04:53,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=332, Invalid=3331, Unknown=1, NotChecked=118, Total=3782 [2021-12-18 20:04:53,064 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 234 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:53,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 570 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 513 Invalid, 0 Unknown, 303 Unchecked, 0.2s Time] [2021-12-18 20:04:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-18 20:04:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2021-12-18 20:04:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 174 states have (on average 1.132183908045977) internal successors, (197), 176 states have internal predecessors, (197), 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) [2021-12-18 20:04:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 197 transitions. [2021-12-18 20:04:53,066 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 197 transitions. Word has length 59 [2021-12-18 20:04:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:53,067 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 197 transitions. [2021-12-18 20:04:53,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5918367346938775) internal successors, (127), 49 states have internal predecessors, (127), 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) [2021-12-18 20:04:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 197 transitions. [2021-12-18 20:04:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-18 20:04:53,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:53,067 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:04:53,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:53,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-18 20:04:53,268 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:53,268 INFO L85 PathProgramCache]: Analyzing trace with hash 471645326, now seen corresponding path program 5 times [2021-12-18 20:04:53,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191595465] [2021-12-18 20:04:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:53,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:04:53,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191595465] [2021-12-18 20:04:53,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191595465] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749996170] [2021-12-18 20:04:53,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:04:53,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:53,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:53,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-18 20:04:53,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 20:04:53,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 20:04:53,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:53,528 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:53,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:04:53,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:04:54,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749996170] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:54,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:54,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-18 20:04:54,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987949429] [2021-12-18 20:04:54,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:54,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 20:04:54,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:54,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 20:04:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-12-18 20:04:54,213 INFO L87 Difference]: Start difference. First operand 177 states and 197 transitions. Second operand has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 30 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:54,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:54,668 INFO L93 Difference]: Finished difference Result 322 states and 358 transitions. [2021-12-18 20:04:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-18 20:04:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 30 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-18 20:04:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:54,669 INFO L225 Difference]: With dead ends: 322 [2021-12-18 20:04:54,669 INFO L226 Difference]: Without dead ends: 322 [2021-12-18 20:04:54,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 20:04:54,670 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 277 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:54,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 437 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:04:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-18 20:04:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 249. [2021-12-18 20:04:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 246 states have (on average 1.1626016260162602) internal successors, (286), 248 states have internal predecessors, (286), 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) [2021-12-18 20:04:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 286 transitions. [2021-12-18 20:04:54,674 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 286 transitions. Word has length 59 [2021-12-18 20:04:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:54,674 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 286 transitions. [2021-12-18 20:04:54,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 30 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:04:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 286 transitions. [2021-12-18 20:04:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-18 20:04:54,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:54,675 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-18 20:04:54,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-18 20:04:54,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:54,886 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1359597257, now seen corresponding path program 5 times [2021-12-18 20:04:54,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227293444] [2021-12-18 20:04:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:54,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:54,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:54,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227293444] [2021-12-18 20:04:54,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227293444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:54,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996211114] [2021-12-18 20:04:54,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:04:54,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:54,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:54,983 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:55,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-18 20:04:55,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 20:04:55,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:55,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-18 20:04:55,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:04:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:04:55,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:04:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:55,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:04:55,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996211114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:55,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:55,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2021-12-18 20:04:55,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256641028] [2021-12-18 20:04:55,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:55,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-18 20:04:55,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-18 20:04:55,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-12-18 20:04:55,700 INFO L87 Difference]: Start difference. First operand 249 states and 286 transitions. Second operand has 25 states, 24 states have (on average 6.791666666666667) internal successors, (163), 25 states have internal predecessors, (163), 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) [2021-12-18 20:04:55,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:04:55,979 INFO L93 Difference]: Finished difference Result 394 states and 451 transitions. [2021-12-18 20:04:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 20:04:55,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 6.791666666666667) internal successors, (163), 25 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-18 20:04:55,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:04:55,981 INFO L225 Difference]: With dead ends: 394 [2021-12-18 20:04:55,981 INFO L226 Difference]: Without dead ends: 394 [2021-12-18 20:04:55,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-12-18 20:04:55,982 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 301 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:04:55,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 248 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:04:55,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-18 20:04:55,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 319. [2021-12-18 20:04:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 316 states have (on average 1.1708860759493671) internal successors, (370), 318 states have internal predecessors, (370), 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) [2021-12-18 20:04:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 370 transitions. [2021-12-18 20:04:55,987 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 370 transitions. Word has length 61 [2021-12-18 20:04:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:04:55,987 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 370 transitions. [2021-12-18 20:04:55,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 6.791666666666667) internal successors, (163), 25 states have internal predecessors, (163), 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) [2021-12-18 20:04:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 370 transitions. [2021-12-18 20:04:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 20:04:55,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:04:55,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:04:56,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-18 20:04:56,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:56,203 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:04:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:04:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash 2111917349, now seen corresponding path program 3 times [2021-12-18 20:04:56,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:04:56,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53614242] [2021-12-18 20:04:56,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:04:56,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:04:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:04:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:04:56,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:04:56,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53614242] [2021-12-18 20:04:56,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53614242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:04:56,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330677397] [2021-12-18 20:04:56,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:04:56,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:04:56,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:04:56,309 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:04:56,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-18 20:04:56,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 20:04:56,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:04:56,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-18 20:04:56,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:04:56,436 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:04:56,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:04:56,610 INFO L388 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 14 treesize of output 10 [2021-12-18 20:04:59,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:04:59,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-18 20:04:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 27 refuted. 7 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 20:04:59,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:04:59,572 INFO L388 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 13 treesize of output 11 [2021-12-18 20:04:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:04:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 20:04:59,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330677397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:04:59,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:04:59,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 34 [2021-12-18 20:04:59,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221899952] [2021-12-18 20:04:59,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:04:59,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 20:04:59,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:04:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 20:04:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1015, Unknown=1, NotChecked=0, Total=1122 [2021-12-18 20:04:59,930 INFO L87 Difference]: Start difference. First operand 319 states and 370 transitions. Second operand has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 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) [2021-12-18 20:05:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:02,765 INFO L93 Difference]: Finished difference Result 417 states and 475 transitions. [2021-12-18 20:05:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 20:05:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-18 20:05:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:02,766 INFO L225 Difference]: With dead ends: 417 [2021-12-18 20:05:02,767 INFO L226 Difference]: Without dead ends: 408 [2021-12-18 20:05:02,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=423, Invalid=3115, Unknown=2, NotChecked=0, Total=3540 [2021-12-18 20:05:02,767 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:02,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 659 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 374 Invalid, 0 Unknown, 198 Unchecked, 0.2s Time] [2021-12-18 20:05:02,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-18 20:05:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 399. [2021-12-18 20:05:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 396 states have (on average 1.1565656565656566) internal successors, (458), 398 states have internal predecessors, (458), 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) [2021-12-18 20:05:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 458 transitions. [2021-12-18 20:05:02,772 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 458 transitions. Word has length 63 [2021-12-18 20:05:02,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:02,772 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 458 transitions. [2021-12-18 20:05:02,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.5588235294117645) internal successors, (155), 34 states have internal predecessors, (155), 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) [2021-12-18 20:05:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 458 transitions. [2021-12-18 20:05:02,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-18 20:05:02,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:02,773 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-12-18 20:05:02,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:02,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-18 20:05:02,987 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 255315348, now seen corresponding path program 3 times [2021-12-18 20:05:02,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344218847] [2021-12-18 20:05:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:03,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:03,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344218847] [2021-12-18 20:05:03,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344218847] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:03,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059683215] [2021-12-18 20:05:03,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:05:03,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:03,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:03,099 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:03,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-18 20:05:03,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 20:05:03,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:03,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-18 20:05:03,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:03,445 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:03,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:03,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 5 [2021-12-18 20:05:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:03,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059683215] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:03,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:03,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2021-12-18 20:05:03,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439742658] [2021-12-18 20:05:03,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:03,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-18 20:05:03,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:03,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-18 20:05:03,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-12-18 20:05:03,716 INFO L87 Difference]: Start difference. First operand 399 states and 458 transitions. Second operand has 30 states, 29 states have (on average 4.724137931034483) internal successors, (137), 30 states have internal predecessors, (137), 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) [2021-12-18 20:05:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:04,154 INFO L93 Difference]: Finished difference Result 419 states and 477 transitions. [2021-12-18 20:05:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:05:04,154 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.724137931034483) internal successors, (137), 30 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-18 20:05:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:04,155 INFO L225 Difference]: With dead ends: 419 [2021-12-18 20:05:04,156 INFO L226 Difference]: Without dead ends: 419 [2021-12-18 20:05:04,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:05:04,156 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 307 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:04,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 300 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-18 20:05:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-18 20:05:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 403. [2021-12-18 20:05:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 400 states have (on average 1.155) internal successors, (462), 402 states have internal predecessors, (462), 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) [2021-12-18 20:05:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 462 transitions. [2021-12-18 20:05:04,162 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 462 transitions. Word has length 63 [2021-12-18 20:05:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:04,162 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 462 transitions. [2021-12-18 20:05:04,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.724137931034483) internal successors, (137), 30 states have internal predecessors, (137), 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) [2021-12-18 20:05:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 462 transitions. [2021-12-18 20:05:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-18 20:05:04,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:04,163 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:04,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:04,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-18 20:05:04,375 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash -287521902, now seen corresponding path program 6 times [2021-12-18 20:05:04,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:04,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430439558] [2021-12-18 20:05:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:04,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:04,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:04,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430439558] [2021-12-18 20:05:04,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430439558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:04,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311933257] [2021-12-18 20:05:04,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:05:04,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:04,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:04,801 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:04,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-18 20:05:04,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 20:05:04,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-18 20:05:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:04,930 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:05:04,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:05:05,168 INFO L388 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 14 treesize of output 10 [2021-12-18 20:05:07,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:07,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 20:05:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:07,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:07,870 INFO L388 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 13 treesize of output 11 [2021-12-18 20:05:07,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:05:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:08,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311933257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:08,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:08,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 53 [2021-12-18 20:05:08,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146547131] [2021-12-18 20:05:08,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:08,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-18 20:05:08,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-18 20:05:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2021-12-18 20:05:08,342 INFO L87 Difference]: Start difference. First operand 403 states and 462 transitions. Second operand has 53 states, 53 states have (on average 3.1320754716981134) internal successors, (166), 53 states have internal predecessors, (166), 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) [2021-12-18 20:05:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:10,130 INFO L93 Difference]: Finished difference Result 512 states and 581 transitions. [2021-12-18 20:05:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 20:05:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.1320754716981134) internal successors, (166), 53 states have internal predecessors, (166), 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 66 [2021-12-18 20:05:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:10,132 INFO L225 Difference]: With dead ends: 512 [2021-12-18 20:05:10,132 INFO L226 Difference]: Without dead ends: 505 [2021-12-18 20:05:10,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=708, Invalid=6948, Unknown=0, NotChecked=0, Total=7656 [2021-12-18 20:05:10,133 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 176 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:10,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 1015 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 821 Invalid, 0 Unknown, 359 Unchecked, 0.4s Time] [2021-12-18 20:05:10,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-18 20:05:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 433. [2021-12-18 20:05:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 430 states have (on average 1.1511627906976745) internal successors, (495), 432 states have internal predecessors, (495), 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) [2021-12-18 20:05:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 495 transitions. [2021-12-18 20:05:10,140 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 495 transitions. Word has length 66 [2021-12-18 20:05:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:10,140 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 495 transitions. [2021-12-18 20:05:10,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.1320754716981134) internal successors, (166), 53 states have internal predecessors, (166), 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) [2021-12-18 20:05:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 495 transitions. [2021-12-18 20:05:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-18 20:05:10,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:10,141 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:10,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:10,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:10,355 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:10,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1762293009, now seen corresponding path program 4 times [2021-12-18 20:05:10,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:10,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363295175] [2021-12-18 20:05:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:10,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:05:10,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:10,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363295175] [2021-12-18 20:05:10,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363295175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:10,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989728605] [2021-12-18 20:05:10,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:05:10,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:10,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:10,472 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:10,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-18 20:05:10,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:05:10,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:10,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-18 20:05:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:10,589 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:05:10,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:05:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:05:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 20:05:10,886 INFO L388 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 19 treesize of output 21 [2021-12-18 20:05:11,393 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-18 20:05:11,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-18 20:05:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:05:11,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:12,295 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_964 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.base| Int) (|v_ULTIMATE.start_substring_~ps~0#1.offset_61| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_964))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_61|) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_61| 2)))) (= 0 .cse0) (< |v_ULTIMATE.start_substring_~ps~0#1.offset_61| 0) (<= (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_61| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)))))) is different from false [2021-12-18 20:05:12,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:12,308 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:05:12,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:12,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:05:12,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:12,336 INFO L388 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 68 treesize of output 64 [2021-12-18 20:05:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:05:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989728605] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:13,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:13,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 19] total 47 [2021-12-18 20:05:13,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121736126] [2021-12-18 20:05:13,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:13,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 20:05:13,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:13,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 20:05:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1978, Unknown=1, NotChecked=90, Total=2256 [2021-12-18 20:05:13,108 INFO L87 Difference]: Start difference. First operand 433 states and 495 transitions. Second operand has 48 states, 47 states have (on average 3.851063829787234) internal successors, (181), 48 states have internal predecessors, (181), 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) [2021-12-18 20:05:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:15,963 INFO L93 Difference]: Finished difference Result 510 states and 568 transitions. [2021-12-18 20:05:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-18 20:05:15,964 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.851063829787234) internal successors, (181), 48 states have internal predecessors, (181), 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 67 [2021-12-18 20:05:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:15,965 INFO L225 Difference]: With dead ends: 510 [2021-12-18 20:05:15,965 INFO L226 Difference]: Without dead ends: 510 [2021-12-18 20:05:15,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=839, Invalid=6304, Unknown=1, NotChecked=166, Total=7310 [2021-12-18 20:05:15,967 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 300 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:15,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 415 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1101 Invalid, 0 Unknown, 446 Unchecked, 0.5s Time] [2021-12-18 20:05:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-18 20:05:15,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 478. [2021-12-18 20:05:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 475 states have (on average 1.1368421052631579) internal successors, (540), 477 states have internal predecessors, (540), 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) [2021-12-18 20:05:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 540 transitions. [2021-12-18 20:05:15,973 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 540 transitions. Word has length 67 [2021-12-18 20:05:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:15,974 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 540 transitions. [2021-12-18 20:05:15,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.851063829787234) internal successors, (181), 48 states have internal predecessors, (181), 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) [2021-12-18 20:05:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 540 transitions. [2021-12-18 20:05:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 20:05:15,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:15,975 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:15,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:16,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:16,194 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -112227697, now seen corresponding path program 5 times [2021-12-18 20:05:16,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963469038] [2021-12-18 20:05:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:16,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:16,324 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:05:16,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963469038] [2021-12-18 20:05:16,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963469038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:16,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927092340] [2021-12-18 20:05:16,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:05:16,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:16,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:16,326 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:16,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-18 20:05:16,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-18 20:05:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 20:05:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:16,484 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:05:16,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:05:16,780 INFO L388 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 6 treesize of output 5 [2021-12-18 20:05:17,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:05:17,246 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:05:17,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 9 [2021-12-18 20:05:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:05:17,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:17,924 INFO L388 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 34 treesize of output 28 [2021-12-18 20:05:17,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:17,932 INFO L388 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 28 treesize of output 28 [2021-12-18 20:05:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 20:05:18,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927092340] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:18,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:18,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 43 [2021-12-18 20:05:18,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975802463] [2021-12-18 20:05:18,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:18,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 20:05:18,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:18,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 20:05:18,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2021-12-18 20:05:18,285 INFO L87 Difference]: Start difference. First operand 478 states and 540 transitions. Second operand has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 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) [2021-12-18 20:05:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:21,121 INFO L93 Difference]: Finished difference Result 575 states and 638 transitions. [2021-12-18 20:05:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 20:05:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 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 70 [2021-12-18 20:05:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:21,123 INFO L225 Difference]: With dead ends: 575 [2021-12-18 20:05:21,123 INFO L226 Difference]: Without dead ends: 575 [2021-12-18 20:05:21,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1499, Invalid=6511, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 20:05:21,124 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 650 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:21,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 688 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-18 20:05:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-12-18 20:05:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 459. [2021-12-18 20:05:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 456 states have (on average 1.1359649122807018) internal successors, (518), 458 states have internal predecessors, (518), 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) [2021-12-18 20:05:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 518 transitions. [2021-12-18 20:05:21,130 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 518 transitions. Word has length 70 [2021-12-18 20:05:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:21,130 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 518 transitions. [2021-12-18 20:05:21,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.27906976744186) internal successors, (184), 44 states have internal predecessors, (184), 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) [2021-12-18 20:05:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 518 transitions. [2021-12-18 20:05:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-18 20:05:21,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:21,132 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:21,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:21,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-18 20:05:21,350 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:21,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1263409199, now seen corresponding path program 7 times [2021-12-18 20:05:21,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:21,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262994638] [2021-12-18 20:05:21,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:21,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:21,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262994638] [2021-12-18 20:05:21,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262994638] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:21,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752580722] [2021-12-18 20:05:21,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:05:21,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:21,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:21,572 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:21,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-18 20:05:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:21,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 20:05:21,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:21,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:22,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-18 20:05:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:22,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752580722] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:22,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:22,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2021-12-18 20:05:22,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718403007] [2021-12-18 20:05:22,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:22,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 20:05:22,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 20:05:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-12-18 20:05:22,260 INFO L87 Difference]: Start difference. First operand 459 states and 518 transitions. Second operand has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 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) [2021-12-18 20:05:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:23,028 INFO L93 Difference]: Finished difference Result 713 states and 799 transitions. [2021-12-18 20:05:23,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:05:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 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 70 [2021-12-18 20:05:23,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:23,030 INFO L225 Difference]: With dead ends: 713 [2021-12-18 20:05:23,030 INFO L226 Difference]: Without dead ends: 713 [2021-12-18 20:05:23,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 20:05:23,031 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 536 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:23,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [536 Valid, 603 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:05:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-12-18 20:05:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 601. [2021-12-18 20:05:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 598 states have (on average 1.1538461538461537) internal successors, (690), 600 states have internal predecessors, (690), 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) [2021-12-18 20:05:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 690 transitions. [2021-12-18 20:05:23,037 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 690 transitions. Word has length 70 [2021-12-18 20:05:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:23,038 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 690 transitions. [2021-12-18 20:05:23,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 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) [2021-12-18 20:05:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 690 transitions. [2021-12-18 20:05:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-18 20:05:23,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:23,039 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:23,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:23,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-12-18 20:05:23,255 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash 850414963, now seen corresponding path program 6 times [2021-12-18 20:05:23,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:23,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736939397] [2021-12-18 20:05:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:23,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:23,626 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:23,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:23,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736939397] [2021-12-18 20:05:23,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736939397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:23,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100243757] [2021-12-18 20:05:23,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:05:23,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:23,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:23,628 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:23,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-18 20:05:23,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 20:05:23,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 20:05:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:23,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:05:23,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:05:24,000 INFO L388 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 17 treesize of output 19 [2021-12-18 20:05:24,539 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-12-18 20:05:24,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2021-12-18 20:05:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:24,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:24,821 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1090 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1090) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 2))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)))) is different from false [2021-12-18 20:05:24,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:24,827 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2021-12-18 20:05:24,842 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-18 20:05:24,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 59 [2021-12-18 20:05:24,862 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 20:05:24,863 INFO L388 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 23 treesize of output 15 [2021-12-18 20:05:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:25,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100243757] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:25,127 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:25,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2021-12-18 20:05:25,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766053462] [2021-12-18 20:05:25,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:25,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 20:05:25,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:25,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 20:05:25,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1423, Unknown=1, NotChecked=76, Total=1640 [2021-12-18 20:05:25,128 INFO L87 Difference]: Start difference. First operand 601 states and 690 transitions. Second operand has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 41 states have internal predecessors, (165), 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) [2021-12-18 20:05:25,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:25,948 INFO L93 Difference]: Finished difference Result 1022 states and 1154 transitions. [2021-12-18 20:05:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 20:05:25,949 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 41 states have internal predecessors, (165), 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 72 [2021-12-18 20:05:25,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:25,951 INFO L225 Difference]: With dead ends: 1022 [2021-12-18 20:05:25,951 INFO L226 Difference]: Without dead ends: 938 [2021-12-18 20:05:25,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=355, Invalid=2728, Unknown=1, NotChecked=108, Total=3192 [2021-12-18 20:05:25,952 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 393 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:25,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 682 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 569 Invalid, 0 Unknown, 202 Unchecked, 0.2s Time] [2021-12-18 20:05:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-12-18 20:05:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 902. [2021-12-18 20:05:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 899 states have (on average 1.1434927697441601) internal successors, (1028), 901 states have internal predecessors, (1028), 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) [2021-12-18 20:05:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1028 transitions. [2021-12-18 20:05:25,961 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1028 transitions. Word has length 72 [2021-12-18 20:05:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:25,961 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1028 transitions. [2021-12-18 20:05:25,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.024390243902439) internal successors, (165), 41 states have internal predecessors, (165), 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) [2021-12-18 20:05:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1028 transitions. [2021-12-18 20:05:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-18 20:05:25,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:25,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:25,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:26,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-12-18 20:05:26,179 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:26,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1890737993, now seen corresponding path program 3 times [2021-12-18 20:05:26,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:26,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894640194] [2021-12-18 20:05:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:26,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 21 proven. 68 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-18 20:05:26,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894640194] [2021-12-18 20:05:26,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894640194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132935847] [2021-12-18 20:05:26,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:05:26,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:26,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:26,493 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:26,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-18 20:05:26,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 20:05:26,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 20:05:26,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:26,741 INFO L388 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 14 treesize of output 10 [2021-12-18 20:05:27,018 INFO L388 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 15 treesize of output 7 [2021-12-18 20:05:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 21 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 20:05:27,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:27,165 INFO L388 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 15 treesize of output 13 [2021-12-18 20:05:27,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:05:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 21 proven. 53 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 20:05:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132935847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:27,289 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:27,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 31 [2021-12-18 20:05:27,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001441122] [2021-12-18 20:05:27,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:27,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-18 20:05:27,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:27,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-18 20:05:27,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-12-18 20:05:27,290 INFO L87 Difference]: Start difference. First operand 902 states and 1028 transitions. Second operand has 31 states, 31 states have (on average 4.258064516129032) internal successors, (132), 31 states have internal predecessors, (132), 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) [2021-12-18 20:05:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:27,855 INFO L93 Difference]: Finished difference Result 895 states and 1001 transitions. [2021-12-18 20:05:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 20:05:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.258064516129032) internal successors, (132), 31 states have internal predecessors, (132), 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 [2021-12-18 20:05:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:27,857 INFO L225 Difference]: With dead ends: 895 [2021-12-18 20:05:27,857 INFO L226 Difference]: Without dead ends: 803 [2021-12-18 20:05:27,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:05:27,858 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 351 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:27,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 495 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 631 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2021-12-18 20:05:27,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-12-18 20:05:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 721. [2021-12-18 20:05:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 718 states have (on average 1.1448467966573816) internal successors, (822), 720 states have internal predecessors, (822), 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) [2021-12-18 20:05:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 822 transitions. [2021-12-18 20:05:27,867 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 822 transitions. Word has length 73 [2021-12-18 20:05:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:27,867 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 822 transitions. [2021-12-18 20:05:27,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.258064516129032) internal successors, (132), 31 states have internal predecessors, (132), 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) [2021-12-18 20:05:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 822 transitions. [2021-12-18 20:05:27,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-18 20:05:27,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:27,868 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:27,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:28,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-18 20:05:28,085 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:28,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:28,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1176796164, now seen corresponding path program 6 times [2021-12-18 20:05:28,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:28,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617512364] [2021-12-18 20:05:28,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:28,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 20 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:28,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617512364] [2021-12-18 20:05:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617512364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137499216] [2021-12-18 20:05:28,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:05:28,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:28,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:28,520 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:28,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-18 20:05:28,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-18 20:05:28,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:28,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-18 20:05:28,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:28,684 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:05:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:05:28,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 10 [2021-12-18 20:05:28,994 INFO L388 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 14 treesize of output 10 [2021-12-18 20:05:29,667 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-12-18 20:05:29,667 INFO L388 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 25 treesize of output 18 [2021-12-18 20:05:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 20:05:29,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:30,147 INFO L388 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 31 treesize of output 27 [2021-12-18 20:05:30,151 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-18 20:05:30,151 INFO L388 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 51 treesize of output 43 [2021-12-18 20:05:30,636 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 62 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-18 20:05:30,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137499216] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:30,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:30,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 58 [2021-12-18 20:05:30,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671633417] [2021-12-18 20:05:30,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:30,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 20:05:30,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:30,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 20:05:30,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 20:05:30,638 INFO L87 Difference]: Start difference. First operand 721 states and 822 transitions. Second operand has 58 states, 58 states have (on average 3.1379310344827585) internal successors, (182), 58 states have internal predecessors, (182), 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) [2021-12-18 20:05:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:33,214 INFO L93 Difference]: Finished difference Result 980 states and 1088 transitions. [2021-12-18 20:05:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-18 20:05:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.1379310344827585) internal successors, (182), 58 states have internal predecessors, (182), 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 74 [2021-12-18 20:05:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:33,217 INFO L225 Difference]: With dead ends: 980 [2021-12-18 20:05:33,217 INFO L226 Difference]: Without dead ends: 966 [2021-12-18 20:05:33,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=755, Invalid=11677, Unknown=0, NotChecked=0, Total=12432 [2021-12-18 20:05:33,219 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 249 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:33,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1222 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1725 Invalid, 0 Unknown, 530 Unchecked, 0.6s Time] [2021-12-18 20:05:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-12-18 20:05:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 845. [2021-12-18 20:05:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 842 states have (on average 1.131828978622328) internal successors, (953), 844 states have internal predecessors, (953), 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) [2021-12-18 20:05:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 953 transitions. [2021-12-18 20:05:33,226 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 953 transitions. Word has length 74 [2021-12-18 20:05:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:33,227 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 953 transitions. [2021-12-18 20:05:33,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.1379310344827585) internal successors, (182), 58 states have internal predecessors, (182), 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) [2021-12-18 20:05:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 953 transitions. [2021-12-18 20:05:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-18 20:05:33,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:33,230 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:33,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:33,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:33,448 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:33,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1226862773, now seen corresponding path program 4 times [2021-12-18 20:05:33,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:33,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484338780] [2021-12-18 20:05:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:33,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:05:34,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:34,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484338780] [2021-12-18 20:05:34,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484338780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:34,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889296206] [2021-12-18 20:05:34,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:05:34,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:34,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:34,075 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:34,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-18 20:05:34,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:05:34,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:34,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 20:05:34,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:34,207 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:05:34,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:05:34,525 INFO L388 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 13 treesize of output 9 [2021-12-18 20:05:35,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:05:35,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:05:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 54 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:35,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:35,552 INFO L388 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 13 treesize of output 11 [2021-12-18 20:05:35,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:05:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:36,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889296206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:36,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:36,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 55 [2021-12-18 20:05:36,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967431056] [2021-12-18 20:05:36,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:36,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-18 20:05:36,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-18 20:05:36,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2746, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 20:05:36,188 INFO L87 Difference]: Start difference. First operand 845 states and 953 transitions. Second operand has 55 states, 55 states have (on average 3.4545454545454546) internal successors, (190), 55 states have internal predecessors, (190), 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) [2021-12-18 20:05:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:38,233 INFO L93 Difference]: Finished difference Result 945 states and 1061 transitions. [2021-12-18 20:05:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-18 20:05:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.4545454545454546) internal successors, (190), 55 states have internal predecessors, (190), 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 74 [2021-12-18 20:05:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:38,236 INFO L225 Difference]: With dead ends: 945 [2021-12-18 20:05:38,236 INFO L226 Difference]: Without dead ends: 939 [2021-12-18 20:05:38,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=773, Invalid=7237, Unknown=0, NotChecked=0, Total=8010 [2021-12-18 20:05:38,237 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 287 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:38,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1307 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 841 Invalid, 0 Unknown, 271 Unchecked, 0.4s Time] [2021-12-18 20:05:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-12-18 20:05:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 919. [2021-12-18 20:05:38,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 916 states have (on average 1.1299126637554586) internal successors, (1035), 918 states have internal predecessors, (1035), 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) [2021-12-18 20:05:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1035 transitions. [2021-12-18 20:05:38,248 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1035 transitions. Word has length 74 [2021-12-18 20:05:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:38,248 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1035 transitions. [2021-12-18 20:05:38,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.4545454545454546) internal successors, (190), 55 states have internal predecessors, (190), 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) [2021-12-18 20:05:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1035 transitions. [2021-12-18 20:05:38,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-18 20:05:38,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:38,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:38,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:38,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:38,471 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1960256400, now seen corresponding path program 7 times [2021-12-18 20:05:38,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:38,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249535952] [2021-12-18 20:05:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:38,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:38,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:38,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249535952] [2021-12-18 20:05:38,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249535952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:38,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418947284] [2021-12-18 20:05:38,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:05:38,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:38,607 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:38,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-18 20:05:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:38,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-18 20:05:38,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:39,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:39,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-18 20:05:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:39,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418947284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:39,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:39,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2021-12-18 20:05:39,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764768356] [2021-12-18 20:05:39,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:39,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-18 20:05:39,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-18 20:05:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-12-18 20:05:39,323 INFO L87 Difference]: Start difference. First operand 919 states and 1035 transitions. Second operand has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 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) [2021-12-18 20:05:39,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:39,725 INFO L93 Difference]: Finished difference Result 1167 states and 1317 transitions. [2021-12-18 20:05:39,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-18 20:05:39,725 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 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 76 [2021-12-18 20:05:39,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:39,727 INFO L225 Difference]: With dead ends: 1167 [2021-12-18 20:05:39,727 INFO L226 Difference]: Without dead ends: 1167 [2021-12-18 20:05:39,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2021-12-18 20:05:39,728 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 474 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:39,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 530 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:05:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-12-18 20:05:39,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1033. [2021-12-18 20:05:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1030 states have (on average 1.1368932038834951) internal successors, (1171), 1032 states have internal predecessors, (1171), 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) [2021-12-18 20:05:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1171 transitions. [2021-12-18 20:05:39,736 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1171 transitions. Word has length 76 [2021-12-18 20:05:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:39,736 INFO L470 AbstractCegarLoop]: Abstraction has 1033 states and 1171 transitions. [2021-12-18 20:05:39,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 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) [2021-12-18 20:05:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1171 transitions. [2021-12-18 20:05:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-18 20:05:39,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:39,738 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:39,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:39,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-18 20:05:39,955 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:39,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1781498856, now seen corresponding path program 7 times [2021-12-18 20:05:39,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:39,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766347687] [2021-12-18 20:05:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:39,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:40,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766347687] [2021-12-18 20:05:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766347687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485466196] [2021-12-18 20:05:40,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:05:40,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:40,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:40,380 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:40,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-18 20:05:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 20:05:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:40,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:05:40,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:05:40,813 INFO L388 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 17 treesize of output 19 [2021-12-18 20:05:41,146 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-18 20:05:41,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-18 20:05:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:41,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:41,387 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1311) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-18 20:05:41,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:41,392 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:05:41,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:05:41,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:05:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:41,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485466196] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:41,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:41,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 44 [2021-12-18 20:05:41,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55577043] [2021-12-18 20:05:41,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:41,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-18 20:05:41,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-18 20:05:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2021-12-18 20:05:41,654 INFO L87 Difference]: Start difference. First operand 1033 states and 1171 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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) [2021-12-18 20:05:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:42,706 INFO L93 Difference]: Finished difference Result 1015 states and 1142 transitions. [2021-12-18 20:05:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 20:05:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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 78 [2021-12-18 20:05:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:42,709 INFO L225 Difference]: With dead ends: 1015 [2021-12-18 20:05:42,709 INFO L226 Difference]: Without dead ends: 878 [2021-12-18 20:05:42,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=357, Invalid=3306, Unknown=1, NotChecked=118, Total=3782 [2021-12-18 20:05:42,710 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 335 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:42,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 915 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1110 Invalid, 0 Unknown, 195 Unchecked, 0.4s Time] [2021-12-18 20:05:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-18 20:05:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 842. [2021-12-18 20:05:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 839 states have (on average 1.1394517282479142) internal successors, (956), 841 states have internal predecessors, (956), 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) [2021-12-18 20:05:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 956 transitions. [2021-12-18 20:05:42,716 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 956 transitions. Word has length 78 [2021-12-18 20:05:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:42,716 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 956 transitions. [2021-12-18 20:05:42,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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) [2021-12-18 20:05:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 956 transitions. [2021-12-18 20:05:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-18 20:05:42,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:42,718 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:42,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-18 20:05:42,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:42,931 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash 116774994, now seen corresponding path program 5 times [2021-12-18 20:05:42,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:42,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122241071] [2021-12-18 20:05:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:42,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 20 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:05:43,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122241071] [2021-12-18 20:05:43,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122241071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211215658] [2021-12-18 20:05:43,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:05:43,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:43,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:43,412 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:43,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-18 20:05:43,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 20:05:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-18 20:05:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:43,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:05:43,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:05:43,862 INFO L388 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 17 treesize of output 19 [2021-12-18 20:05:44,878 INFO L354 Elim1Store]: treesize reduction 5, result has 87.2 percent of original size [2021-12-18 20:05:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 47 [2021-12-18 20:05:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:05:45,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:45,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:45,947 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:05:45,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:45,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:05:45,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:45,983 INFO L388 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 68 treesize of output 64 [2021-12-18 20:05:46,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 17 [2021-12-18 20:05:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:05:46,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211215658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:46,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:46,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 60 [2021-12-18 20:05:46,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853568058] [2021-12-18 20:05:46,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 20:05:46,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 20:05:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3294, Unknown=1, NotChecked=0, Total=3540 [2021-12-18 20:05:46,697 INFO L87 Difference]: Start difference. First operand 842 states and 956 transitions. Second operand has 60 states, 60 states have (on average 3.2333333333333334) internal successors, (194), 60 states have internal predecessors, (194), 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) [2021-12-18 20:05:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:50,180 INFO L93 Difference]: Finished difference Result 877 states and 990 transitions. [2021-12-18 20:05:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-18 20:05:50,180 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.2333333333333334) internal successors, (194), 60 states have internal predecessors, (194), 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 78 [2021-12-18 20:05:50,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:50,182 INFO L225 Difference]: With dead ends: 877 [2021-12-18 20:05:50,182 INFO L226 Difference]: Without dead ends: 836 [2021-12-18 20:05:50,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=559, Invalid=6580, Unknown=1, NotChecked=0, Total=7140 [2021-12-18 20:05:50,182 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 207 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 572 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:50,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 954 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 641 Invalid, 0 Unknown, 572 Unchecked, 0.3s Time] [2021-12-18 20:05:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-12-18 20:05:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 826. [2021-12-18 20:05:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 823 states have (on average 1.1397326852976915) internal successors, (938), 825 states have internal predecessors, (938), 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) [2021-12-18 20:05:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 938 transitions. [2021-12-18 20:05:50,189 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 938 transitions. Word has length 78 [2021-12-18 20:05:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:50,189 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 938 transitions. [2021-12-18 20:05:50,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.2333333333333334) internal successors, (194), 60 states have internal predecessors, (194), 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) [2021-12-18 20:05:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 938 transitions. [2021-12-18 20:05:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 20:05:50,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:50,190 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:50,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-12-18 20:05:50,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:50,403 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash 515705984, now seen corresponding path program 8 times [2021-12-18 20:05:50,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:50,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311529977] [2021-12-18 20:05:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:50,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:50,683 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 80 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:05:50,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:50,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311529977] [2021-12-18 20:05:50,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311529977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:50,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354983335] [2021-12-18 20:05:50,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:05:50,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:50,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:50,684 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:50,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-18 20:05:50,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:05:50,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:50,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-18 20:05:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:51,031 INFO L388 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 14 treesize of output 10 [2021-12-18 20:05:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:05:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:05:52,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:52,221 INFO L388 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 28 treesize of output 14 [2021-12-18 20:05:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 10 proven. 93 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 20:05:52,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:52,877 INFO L388 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 31 treesize of output 27 [2021-12-18 20:05:52,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:05:52,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-12-18 20:05:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 17 proven. 86 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-18 20:05:53,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354983335] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:53,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:53,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 54 [2021-12-18 20:05:53,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414454705] [2021-12-18 20:05:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:53,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 20:05:53,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 20:05:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2687, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 20:05:53,265 INFO L87 Difference]: Start difference. First operand 826 states and 938 transitions. Second operand has 54 states, 54 states have (on average 3.314814814814815) internal successors, (179), 54 states have internal predecessors, (179), 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) [2021-12-18 20:05:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:05:55,599 INFO L93 Difference]: Finished difference Result 820 states and 907 transitions. [2021-12-18 20:05:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-18 20:05:55,599 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.314814814814815) internal successors, (179), 54 states have internal predecessors, (179), 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 81 [2021-12-18 20:05:55,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:05:55,601 INFO L225 Difference]: With dead ends: 820 [2021-12-18 20:05:55,601 INFO L226 Difference]: Without dead ends: 742 [2021-12-18 20:05:55,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=810, Invalid=11180, Unknown=0, NotChecked=0, Total=11990 [2021-12-18 20:05:55,602 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 188 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:05:55,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1321 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 924 Invalid, 0 Unknown, 469 Unchecked, 0.4s Time] [2021-12-18 20:05:55,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-12-18 20:05:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 618. [2021-12-18 20:05:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 615 states have (on average 1.1333333333333333) internal successors, (697), 617 states have internal predecessors, (697), 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) [2021-12-18 20:05:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 697 transitions. [2021-12-18 20:05:55,607 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 697 transitions. Word has length 81 [2021-12-18 20:05:55,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:05:55,607 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 697 transitions. [2021-12-18 20:05:55,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.314814814814815) internal successors, (179), 54 states have internal predecessors, (179), 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) [2021-12-18 20:05:55,607 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 697 transitions. [2021-12-18 20:05:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-18 20:05:55,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:05:55,608 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:05:55,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-18 20:05:55,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-12-18 20:05:55,818 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:05:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:05:55,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1760327563, now seen corresponding path program 9 times [2021-12-18 20:05:55,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:05:55,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738602031] [2021-12-18 20:05:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:05:55,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:05:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:05:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-18 20:05:55,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:05:55,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738602031] [2021-12-18 20:05:55,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738602031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:05:55,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939272101] [2021-12-18 20:05:55,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:05:55,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:05:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:05:55,972 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:05:56,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-18 20:05:56,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-18 20:05:56,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:05:56,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 20:05:56,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:05:56,156 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:05:56,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:05:56,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:05:56,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:05:56,415 INFO L388 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 17 treesize of output 19 [2021-12-18 20:05:57,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:57,377 INFO L388 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 1 case distinctions, treesize of input 33 treesize of output 25 [2021-12-18 20:05:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 20:05:57,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:05:58,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:58,731 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-18 20:05:58,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:58,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-18 20:05:58,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:05:58,747 INFO L388 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 30 treesize of output 30 [2021-12-18 20:05:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 20:05:59,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939272101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:05:59,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:05:59,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 36 [2021-12-18 20:05:59,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080682177] [2021-12-18 20:05:59,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:05:59,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-18 20:05:59,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:05:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-18 20:05:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1206, Unknown=16, NotChecked=0, Total=1332 [2021-12-18 20:05:59,168 INFO L87 Difference]: Start difference. First operand 618 states and 697 transitions. Second operand has 37 states, 36 states have (on average 4.611111111111111) internal successors, (166), 37 states have internal predecessors, (166), 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) [2021-12-18 20:06:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:01,146 INFO L93 Difference]: Finished difference Result 959 states and 1076 transitions. [2021-12-18 20:06:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-18 20:06:01,146 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.611111111111111) internal successors, (166), 37 states have internal predecessors, (166), 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 82 [2021-12-18 20:06:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:01,148 INFO L225 Difference]: With dead ends: 959 [2021-12-18 20:06:01,148 INFO L226 Difference]: Without dead ends: 959 [2021-12-18 20:06:01,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=781, Invalid=7570, Unknown=21, NotChecked=0, Total=8372 [2021-12-18 20:06:01,150 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:01,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 327 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 260 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2021-12-18 20:06:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-12-18 20:06:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 912. [2021-12-18 20:06:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 909 states have (on average 1.130913091309131) internal successors, (1028), 911 states have internal predecessors, (1028), 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) [2021-12-18 20:06:01,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1028 transitions. [2021-12-18 20:06:01,164 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1028 transitions. Word has length 82 [2021-12-18 20:06:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:01,164 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1028 transitions. [2021-12-18 20:06:01,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.611111111111111) internal successors, (166), 37 states have internal predecessors, (166), 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) [2021-12-18 20:06:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1028 transitions. [2021-12-18 20:06:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-18 20:06:01,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:01,166 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:01,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-18 20:06:01,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-18 20:06:01,379 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:06:01,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -725839209, now seen corresponding path program 8 times [2021-12-18 20:06:01,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:01,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823387697] [2021-12-18 20:06:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:01,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:01,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:01,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823387697] [2021-12-18 20:06:01,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823387697] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:01,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884638612] [2021-12-18 20:06:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:06:01,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:01,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:01,672 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:01,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-18 20:06:01,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:06:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-18 20:06:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:02,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:02,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-18 20:06:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:02,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884638612] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:02,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:02,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2021-12-18 20:06:02,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932071574] [2021-12-18 20:06:02,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:02,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-18 20:06:02,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-18 20:06:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-12-18 20:06:02,517 INFO L87 Difference]: Start difference. First operand 912 states and 1028 transitions. Second operand has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 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) [2021-12-18 20:06:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:03,582 INFO L93 Difference]: Finished difference Result 1496 states and 1689 transitions. [2021-12-18 20:06:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-18 20:06:03,582 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 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 85 [2021-12-18 20:06:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:03,585 INFO L225 Difference]: With dead ends: 1496 [2021-12-18 20:06:03,585 INFO L226 Difference]: Without dead ends: 1496 [2021-12-18 20:06:03,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 20:06:03,586 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 541 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:03,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 886 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:06:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-12-18 20:06:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1317. [2021-12-18 20:06:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1314 states have (on average 1.1491628614916287) internal successors, (1510), 1316 states have internal predecessors, (1510), 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) [2021-12-18 20:06:03,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1510 transitions. [2021-12-18 20:06:03,594 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1510 transitions. Word has length 85 [2021-12-18 20:06:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:03,595 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 1510 transitions. [2021-12-18 20:06:03,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 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) [2021-12-18 20:06:03,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1510 transitions. [2021-12-18 20:06:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-18 20:06:03,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:03,596 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:03,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:03,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-18 20:06:03,816 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:06:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1679386246, now seen corresponding path program 8 times [2021-12-18 20:06:03,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:03,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394576095] [2021-12-18 20:06:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:03,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:04,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:04,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394576095] [2021-12-18 20:06:04,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394576095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:04,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99152975] [2021-12-18 20:06:04,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:06:04,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:04,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:04,210 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:04,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-18 20:06:04,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:06:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:04,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-18 20:06:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:04,624 INFO L388 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 14 treesize of output 10 [2021-12-18 20:06:04,668 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:06:04,669 INFO L388 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 17 treesize of output 23 [2021-12-18 20:06:04,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 3 [2021-12-18 20:06:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:06:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:06:05,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:06:05,798 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-18 20:06:05,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 18 [2021-12-18 20:06:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:05,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:06,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:06,183 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2021-12-18 20:06:06,195 INFO L354 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2021-12-18 20:06:06,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 61 [2021-12-18 20:06:06,209 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-18 20:06:06,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 41 [2021-12-18 20:06:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:06,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99152975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:06,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:06,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 56 [2021-12-18 20:06:06,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333421413] [2021-12-18 20:06:06,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:06,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 20:06:06,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 20:06:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2876, Unknown=9, NotChecked=0, Total=3080 [2021-12-18 20:06:06,622 INFO L87 Difference]: Start difference. First operand 1317 states and 1510 transitions. Second operand has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 56 states have internal predecessors, (198), 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) [2021-12-18 20:06:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:06,935 INFO L93 Difference]: Finished difference Result 1591 states and 1801 transitions. [2021-12-18 20:06:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-18 20:06:06,935 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 56 states have internal predecessors, (198), 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 87 [2021-12-18 20:06:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:06,938 INFO L225 Difference]: With dead ends: 1591 [2021-12-18 20:06:06,938 INFO L226 Difference]: Without dead ends: 1526 [2021-12-18 20:06:06,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=244, Invalid=3529, Unknown=9, NotChecked=0, Total=3782 [2021-12-18 20:06:06,939 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:06,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 769 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 483 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2021-12-18 20:06:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-12-18 20:06:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1523. [2021-12-18 20:06:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1520 states have (on average 1.1401315789473685) internal successors, (1733), 1522 states have internal predecessors, (1733), 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) [2021-12-18 20:06:06,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 1733 transitions. [2021-12-18 20:06:06,948 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 1733 transitions. Word has length 87 [2021-12-18 20:06:06,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:06,948 INFO L470 AbstractCegarLoop]: Abstraction has 1523 states and 1733 transitions. [2021-12-18 20:06:06,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 56 states have internal predecessors, (198), 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) [2021-12-18 20:06:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 1733 transitions. [2021-12-18 20:06:06,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-18 20:06:06,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:06,950 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:06,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:07,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:07,150 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:06:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:07,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1346231488, now seen corresponding path program 10 times [2021-12-18 20:06:07,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:07,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292290162] [2021-12-18 20:06:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:07,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 6 proven. 128 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:06:07,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:07,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292290162] [2021-12-18 20:06:07,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292290162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:07,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94760553] [2021-12-18 20:06:07,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:06:07,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:07,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:07,292 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:07,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-18 20:06:07,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:06:07,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:07,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-18 20:06:07,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:06:07,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:06:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 20:06:07,634 INFO L388 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 19 treesize of output 21 [2021-12-18 20:06:08,067 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-18 20:06:08,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-18 20:06:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 53 proven. 60 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-18 20:06:08,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:09,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:09,240 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:06:09,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:09,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:06:09,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:09,266 INFO L388 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 68 treesize of output 64 [2021-12-18 20:06:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 20:06:09,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94760553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:09,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:09,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 17] total 45 [2021-12-18 20:06:09,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555530971] [2021-12-18 20:06:09,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:09,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 20:06:09,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 20:06:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1876, Unknown=13, NotChecked=0, Total=2070 [2021-12-18 20:06:09,871 INFO L87 Difference]: Start difference. First operand 1523 states and 1733 transitions. Second operand has 46 states, 45 states have (on average 4.5777777777777775) internal successors, (206), 46 states have internal predecessors, (206), 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) [2021-12-18 20:06:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:12,503 INFO L93 Difference]: Finished difference Result 1601 states and 1798 transitions. [2021-12-18 20:06:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 20:06:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.5777777777777775) internal successors, (206), 46 states have internal predecessors, (206), 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 89 [2021-12-18 20:06:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:12,510 INFO L225 Difference]: With dead ends: 1601 [2021-12-18 20:06:12,510 INFO L226 Difference]: Without dead ends: 1601 [2021-12-18 20:06:12,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1401, Invalid=9298, Unknown=13, NotChecked=0, Total=10712 [2021-12-18 20:06:12,511 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 589 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1666 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:12,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 584 Invalid, 2130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1666 Invalid, 0 Unknown, 350 Unchecked, 0.6s Time] [2021-12-18 20:06:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-12-18 20:06:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1395. [2021-12-18 20:06:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1392 states have (on average 1.1379310344827587) internal successors, (1584), 1394 states have internal predecessors, (1584), 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) [2021-12-18 20:06:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1584 transitions. [2021-12-18 20:06:12,520 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1584 transitions. Word has length 89 [2021-12-18 20:06:12,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:12,520 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 1584 transitions. [2021-12-18 20:06:12,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.5777777777777775) internal successors, (206), 46 states have internal predecessors, (206), 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) [2021-12-18 20:06:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1584 transitions. [2021-12-18 20:06:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-18 20:06:12,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:12,521 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:12,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:12,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-18 20:06:12,738 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:06:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1303579462, now seen corresponding path program 11 times [2021-12-18 20:06:12,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548692699] [2021-12-18 20:06:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:12,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 112 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:06:12,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:12,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548692699] [2021-12-18 20:06:12,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548692699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:12,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10571417] [2021-12-18 20:06:12,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:06:12,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:12,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:12,883 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:12,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-18 20:06:13,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-18 20:06:13,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-18 20:06:13,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:13,392 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 15 proven. 103 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:06:13,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:13,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 17 [2021-12-18 20:06:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 15 proven. 103 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:06:13,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10571417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:13,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:13,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2021-12-18 20:06:13,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162295992] [2021-12-18 20:06:13,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:13,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-18 20:06:13,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-18 20:06:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-12-18 20:06:13,879 INFO L87 Difference]: Start difference. First operand 1395 states and 1584 transitions. Second operand has 33 states, 32 states have (on average 5.53125) internal successors, (177), 33 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) [2021-12-18 20:06:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:14,555 INFO L93 Difference]: Finished difference Result 1466 states and 1650 transitions. [2021-12-18 20:06:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 20:06:14,555 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.53125) internal successors, (177), 33 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) Word has length 89 [2021-12-18 20:06:14,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:14,558 INFO L225 Difference]: With dead ends: 1466 [2021-12-18 20:06:14,558 INFO L226 Difference]: Without dead ends: 1466 [2021-12-18 20:06:14,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=706, Invalid=2156, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 20:06:14,559 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 574 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:14,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 316 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:06:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-12-18 20:06:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1395. [2021-12-18 20:06:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1392 states have (on average 1.1364942528735633) internal successors, (1582), 1394 states have internal predecessors, (1582), 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) [2021-12-18 20:06:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1582 transitions. [2021-12-18 20:06:14,567 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1582 transitions. Word has length 89 [2021-12-18 20:06:14,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:14,567 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 1582 transitions. [2021-12-18 20:06:14,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.53125) internal successors, (177), 33 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) [2021-12-18 20:06:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1582 transitions. [2021-12-18 20:06:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-18 20:06:14,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:14,569 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:14,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:14,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-12-18 20:06:14,769 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:06:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2046876227, now seen corresponding path program 9 times [2021-12-18 20:06:14,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:14,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392406163] [2021-12-18 20:06:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:14,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:14,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392406163] [2021-12-18 20:06:14,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392406163] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:14,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986285792] [2021-12-18 20:06:14,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:06:14,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:14,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:14,935 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:14,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-18 20:06:15,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-18 20:06:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:15,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 20:06:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:15,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:15,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 5 [2021-12-18 20:06:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 28 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:06:15,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986285792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:15,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:15,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 38 [2021-12-18 20:06:15,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731879830] [2021-12-18 20:06:15,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:15,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-18 20:06:15,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-18 20:06:15,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-12-18 20:06:15,844 INFO L87 Difference]: Start difference. First operand 1395 states and 1582 transitions. Second operand has 39 states, 38 states have (on average 6.2368421052631575) internal successors, (237), 39 states have internal predecessors, (237), 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) [2021-12-18 20:06:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:16,534 INFO L93 Difference]: Finished difference Result 2780 states and 3166 transitions. [2021-12-18 20:06:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 20:06:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 6.2368421052631575) internal successors, (237), 39 states have internal predecessors, (237), 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 91 [2021-12-18 20:06:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:16,540 INFO L225 Difference]: With dead ends: 2780 [2021-12-18 20:06:16,540 INFO L226 Difference]: Without dead ends: 2780 [2021-12-18 20:06:16,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=626, Invalid=2236, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 20:06:16,540 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 701 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:16,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 651 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:06:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-12-18 20:06:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 1951. [2021-12-18 20:06:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1948 states have (on average 1.1396303901437372) internal successors, (2220), 1950 states have internal predecessors, (2220), 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) [2021-12-18 20:06:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2220 transitions. [2021-12-18 20:06:16,555 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2220 transitions. Word has length 91 [2021-12-18 20:06:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:16,555 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 2220 transitions. [2021-12-18 20:06:16,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 6.2368421052631575) internal successors, (237), 39 states have internal predecessors, (237), 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) [2021-12-18 20:06:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2220 transitions. [2021-12-18 20:06:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-18 20:06:16,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:16,557 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:16,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:16,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:16,758 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:06:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1175467512, now seen corresponding path program 4 times [2021-12-18 20:06:16,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:16,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144466387] [2021-12-18 20:06:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:16,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 78 proven. 63 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:17,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144466387] [2021-12-18 20:06:17,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144466387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:17,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863998833] [2021-12-18 20:06:17,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:06:17,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:17,120 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:17,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-18 20:06:17,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:06:17,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:17,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-18 20:06:17,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:06:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:06:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:06:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 80 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:17,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 79 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:18,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863998833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:18,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:18,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 41 [2021-12-18 20:06:18,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815916984] [2021-12-18 20:06:18,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:18,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 20:06:18,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 20:06:18,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 20:06:18,060 INFO L87 Difference]: Start difference. First operand 1951 states and 2220 transitions. Second operand has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 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) [2021-12-18 20:06:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:06:19,536 INFO L93 Difference]: Finished difference Result 2518 states and 2827 transitions. [2021-12-18 20:06:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 20:06:19,540 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 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 92 [2021-12-18 20:06:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:06:19,545 INFO L225 Difference]: With dead ends: 2518 [2021-12-18 20:06:19,545 INFO L226 Difference]: Without dead ends: 2488 [2021-12-18 20:06:19,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=814, Invalid=3608, Unknown=0, NotChecked=0, Total=4422 [2021-12-18 20:06:19,545 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 339 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:06:19,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 437 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:06:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-12-18 20:06:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 1919. [2021-12-18 20:06:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1916 states have (on average 1.1393528183716075) internal successors, (2183), 1918 states have internal predecessors, (2183), 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) [2021-12-18 20:06:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 2183 transitions. [2021-12-18 20:06:19,559 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 2183 transitions. Word has length 92 [2021-12-18 20:06:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:06:19,559 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 2183 transitions. [2021-12-18 20:06:19,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 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) [2021-12-18 20:06:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 2183 transitions. [2021-12-18 20:06:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-18 20:06:19,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:06:19,561 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:06:19,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-12-18 20:06:19,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-18 20:06:19,771 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:06:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:06:19,772 INFO L85 PathProgramCache]: Analyzing trace with hash -137707159, now seen corresponding path program 9 times [2021-12-18 20:06:19,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:06:19,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235547552] [2021-12-18 20:06:19,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:06:19,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:06:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:06:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 61 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:06:19,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:06:19,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235547552] [2021-12-18 20:06:19,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235547552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:06:19,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258693066] [2021-12-18 20:06:19,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:06:19,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:06:19,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:06:19,930 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:06:19,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-18 20:06:20,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-18 20:06:20,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:06:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 20:06:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:06:20,245 INFO L388 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 14 treesize of output 10 [2021-12-18 20:06:25,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:06:25,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-18 20:06:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:25,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:06:26,124 INFO L388 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 13 treesize of output 11 [2021-12-18 20:06:26,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:06:26,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 31 [2021-12-18 20:06:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:06:26,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258693066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:06:26,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:06:26,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 48 [2021-12-18 20:06:26,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026269958] [2021-12-18 20:06:26,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:06:26,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 20:06:26,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:06:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 20:06:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2021, Unknown=1, NotChecked=0, Total=2256 [2021-12-18 20:06:26,198 INFO L87 Difference]: Start difference. First operand 1919 states and 2183 transitions. Second operand has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 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) [2021-12-18 20:07:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:00,013 INFO L93 Difference]: Finished difference Result 2143 states and 2411 transitions. [2021-12-18 20:07:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-18 20:07:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 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 92 [2021-12-18 20:07:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:00,019 INFO L225 Difference]: With dead ends: 2143 [2021-12-18 20:07:00,019 INFO L226 Difference]: Without dead ends: 2138 [2021-12-18 20:07:00,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 152 SyntacticMatches, 13 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=2217, Invalid=11821, Unknown=4, NotChecked=0, Total=14042 [2021-12-18 20:07:00,021 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 836 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 3939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2178 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:00,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 1452 Invalid, 3939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1727 Invalid, 0 Unknown, 2178 Unchecked, 0.7s Time] [2021-12-18 20:07:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-12-18 20:07:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1897. [2021-12-18 20:07:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1897 states, 1894 states have (on average 1.1388595564941921) internal successors, (2157), 1896 states have internal predecessors, (2157), 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) [2021-12-18 20:07:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2157 transitions. [2021-12-18 20:07:00,033 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2157 transitions. Word has length 92 [2021-12-18 20:07:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:00,033 INFO L470 AbstractCegarLoop]: Abstraction has 1897 states and 2157 transitions. [2021-12-18 20:07:00,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 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) [2021-12-18 20:07:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2157 transitions. [2021-12-18 20:07:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 20:07:00,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:00,035 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:00,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:00,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:00,235 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1480329382, now seen corresponding path program 12 times [2021-12-18 20:07:00,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:00,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571797211] [2021-12-18 20:07:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:00,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 30 proven. 128 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:07:00,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:00,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571797211] [2021-12-18 20:07:00,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571797211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:00,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182678408] [2021-12-18 20:07:00,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:07:00,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:00,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:00,536 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:00,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-18 20:07:00,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-18 20:07:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:00,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 20:07:00,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:00,893 INFO L388 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 14 treesize of output 10 [2021-12-18 20:07:01,421 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:07:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:07:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 20:07:01,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:01,769 INFO L388 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 15 treesize of output 13 [2021-12-18 20:07:01,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:07:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 20:07:01,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182678408] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:01,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:01,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 18] total 46 [2021-12-18 20:07:01,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767457] [2021-12-18 20:07:01,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:01,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 20:07:01,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 20:07:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 20:07:01,934 INFO L87 Difference]: Start difference. First operand 1897 states and 2157 transitions. Second operand has 46 states, 46 states have (on average 4.304347826086956) internal successors, (198), 46 states have internal predecessors, (198), 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) [2021-12-18 20:07:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:05,279 INFO L93 Difference]: Finished difference Result 2333 states and 2591 transitions. [2021-12-18 20:07:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-18 20:07:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.304347826086956) internal successors, (198), 46 states have internal predecessors, (198), 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 96 [2021-12-18 20:07:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:05,283 INFO L225 Difference]: With dead ends: 2333 [2021-12-18 20:07:05,283 INFO L226 Difference]: Without dead ends: 2300 [2021-12-18 20:07:05,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 167 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 3743 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=801, Invalid=13719, Unknown=0, NotChecked=0, Total=14520 [2021-12-18 20:07:05,284 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 600 mSDsluCounter, 2674 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 4148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:05,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 2774 Invalid, 4148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3016 Invalid, 0 Unknown, 1051 Unchecked, 1.1s Time] [2021-12-18 20:07:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-12-18 20:07:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1876. [2021-12-18 20:07:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1873 states have (on average 1.1238654564869195) internal successors, (2105), 1875 states have internal predecessors, (2105), 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) [2021-12-18 20:07:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2105 transitions. [2021-12-18 20:07:05,300 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2105 transitions. Word has length 96 [2021-12-18 20:07:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:05,300 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 2105 transitions. [2021-12-18 20:07:05,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.304347826086956) internal successors, (198), 46 states have internal predecessors, (198), 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) [2021-12-18 20:07:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2105 transitions. [2021-12-18 20:07:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-18 20:07:05,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:05,302 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:05,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:05,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:05,512 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:05,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1426881831, now seen corresponding path program 1 times [2021-12-18 20:07:05,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:05,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463246969] [2021-12-18 20:07:05,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:07:05,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:05,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463246969] [2021-12-18 20:07:05,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463246969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:05,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728795476] [2021-12-18 20:07:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:05,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:05,964 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:05,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-18 20:07:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 20:07:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:06,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:06,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:07:06,438 INFO L388 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 17 treesize of output 19 [2021-12-18 20:07:06,677 INFO L388 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 15 treesize of output 7 [2021-12-18 20:07:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:07:06,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:06,850 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1906 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1906) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-18 20:07:06,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:06,858 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:07:06,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:06,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:07:06,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:07:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 48 proven. 123 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:07:07,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728795476] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:07,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:07,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 36 [2021-12-18 20:07:07,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42509170] [2021-12-18 20:07:07,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:07,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-18 20:07:07,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:07,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-18 20:07:07,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1101, Unknown=1, NotChecked=66, Total=1260 [2021-12-18 20:07:07,111 INFO L87 Difference]: Start difference. First operand 1876 states and 2105 transitions. Second operand has 36 states, 36 states have (on average 4.027777777777778) internal successors, (145), 36 states have internal predecessors, (145), 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) [2021-12-18 20:07:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:08,179 INFO L93 Difference]: Finished difference Result 2058 states and 2293 transitions. [2021-12-18 20:07:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 20:07:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.027777777777778) internal successors, (145), 36 states have internal predecessors, (145), 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 98 [2021-12-18 20:07:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:08,182 INFO L225 Difference]: With dead ends: 2058 [2021-12-18 20:07:08,182 INFO L226 Difference]: Without dead ends: 1847 [2021-12-18 20:07:08,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 178 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=2384, Unknown=1, NotChecked=100, Total=2756 [2021-12-18 20:07:08,183 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 431 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:08,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 904 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1126 Invalid, 0 Unknown, 121 Unchecked, 0.4s Time] [2021-12-18 20:07:08,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-12-18 20:07:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1816. [2021-12-18 20:07:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1813 states have (on average 1.1196911196911197) internal successors, (2030), 1815 states have internal predecessors, (2030), 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) [2021-12-18 20:07:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2030 transitions. [2021-12-18 20:07:08,195 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2030 transitions. Word has length 98 [2021-12-18 20:07:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:08,195 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 2030 transitions. [2021-12-18 20:07:08,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.027777777777778) internal successors, (145), 36 states have internal predecessors, (145), 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) [2021-12-18 20:07:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2030 transitions. [2021-12-18 20:07:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 20:07:08,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:08,197 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:08,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:08,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-18 20:07:08,397 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash 722795977, now seen corresponding path program 13 times [2021-12-18 20:07:08,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:08,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308051903] [2021-12-18 20:07:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:08,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 159 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 20:07:08,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:08,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308051903] [2021-12-18 20:07:08,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308051903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724144836] [2021-12-18 20:07:08,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:07:08,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:08,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:08,983 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:08,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-18 20:07:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:09,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 20:07:09,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:09,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:09,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:07:09,508 INFO L388 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 17 treesize of output 19 [2021-12-18 20:07:09,896 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-18 20:07:09,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-18 20:07:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:09,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:10,197 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1956 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1956) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-18 20:07:10,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:10,202 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:07:10,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:10,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:07:10,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:07:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 144 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:10,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724144836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:10,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:10,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 48 [2021-12-18 20:07:10,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944052498] [2021-12-18 20:07:10,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:10,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 20:07:10,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 20:07:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2029, Unknown=1, NotChecked=90, Total=2256 [2021-12-18 20:07:10,487 INFO L87 Difference]: Start difference. First operand 1816 states and 2030 transitions. Second operand has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 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) [2021-12-18 20:07:11,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:11,882 INFO L93 Difference]: Finished difference Result 1810 states and 2018 transitions. [2021-12-18 20:07:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-18 20:07:11,883 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 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 100 [2021-12-18 20:07:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:11,885 INFO L225 Difference]: With dead ends: 1810 [2021-12-18 20:07:11,885 INFO L226 Difference]: Without dead ends: 1594 [2021-12-18 20:07:11,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 174 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=353, Invalid=4480, Unknown=1, NotChecked=136, Total=4970 [2021-12-18 20:07:11,886 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 132 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:11,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1088 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1557 Invalid, 0 Unknown, 284 Unchecked, 0.6s Time] [2021-12-18 20:07:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-12-18 20:07:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1583. [2021-12-18 20:07:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1580 states have (on average 1.1221518987341772) internal successors, (1773), 1582 states have internal predecessors, (1773), 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) [2021-12-18 20:07:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 1773 transitions. [2021-12-18 20:07:11,898 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 1773 transitions. Word has length 100 [2021-12-18 20:07:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:11,898 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 1773 transitions. [2021-12-18 20:07:11,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 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) [2021-12-18 20:07:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 1773 transitions. [2021-12-18 20:07:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-18 20:07:11,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:11,900 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:11,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-18 20:07:12,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-18 20:07:12,115 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1191848042, now seen corresponding path program 14 times [2021-12-18 20:07:12,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:12,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389398515] [2021-12-18 20:07:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:12,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 30 proven. 134 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:07:12,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:12,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389398515] [2021-12-18 20:07:12,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389398515] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:12,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179575833] [2021-12-18 20:07:12,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:07:12,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:12,420 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:12,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-18 20:07:12,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:07:12,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:12,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-18 20:07:12,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:12,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:12,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:07:12,890 INFO L388 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 17 treesize of output 19 [2021-12-18 20:07:13,219 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-18 20:07:13,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-18 20:07:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 30 proven. 134 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:07:13,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:13,482 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2010 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2010) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-18 20:07:13,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:13,488 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:07:13,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:13,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:07:13,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:07:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 30 proven. 134 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:07:13,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179575833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:13,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:13,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 42 [2021-12-18 20:07:13,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899582076] [2021-12-18 20:07:13,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:13,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-18 20:07:13,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-18 20:07:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1516, Unknown=1, NotChecked=78, Total=1722 [2021-12-18 20:07:13,776 INFO L87 Difference]: Start difference. First operand 1583 states and 1773 transitions. Second operand has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 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) [2021-12-18 20:07:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:14,556 INFO L93 Difference]: Finished difference Result 1576 states and 1763 transitions. [2021-12-18 20:07:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 20:07:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 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 100 [2021-12-18 20:07:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:14,558 INFO L225 Difference]: With dead ends: 1576 [2021-12-18 20:07:14,558 INFO L226 Difference]: Without dead ends: 1345 [2021-12-18 20:07:14,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 177 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=295, Invalid=3014, Unknown=1, NotChecked=112, Total=3422 [2021-12-18 20:07:14,559 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 216 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:14,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 735 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 894 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2021-12-18 20:07:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-12-18 20:07:14,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1342. [2021-12-18 20:07:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1339 states have (on average 1.1314413741598208) internal successors, (1515), 1341 states have internal predecessors, (1515), 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) [2021-12-18 20:07:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1515 transitions. [2021-12-18 20:07:14,568 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1515 transitions. Word has length 100 [2021-12-18 20:07:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:14,568 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 1515 transitions. [2021-12-18 20:07:14,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 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) [2021-12-18 20:07:14,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1515 transitions. [2021-12-18 20:07:14,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-18 20:07:14,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:14,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:14,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:14,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-18 20:07:14,770 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2135124269, now seen corresponding path program 10 times [2021-12-18 20:07:14,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:14,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377943056] [2021-12-18 20:07:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:14,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:15,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377943056] [2021-12-18 20:07:15,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377943056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887458101] [2021-12-18 20:07:15,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:07:15,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:15,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:15,218 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:15,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-18 20:07:15,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:07:15,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:15,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 20:07:15,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:15,397 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:15,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:07:15,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:15,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:07:15,850 INFO L388 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 17 treesize of output 19 [2021-12-18 20:07:16,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:07:16,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:07:16,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 9 [2021-12-18 20:07:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 166 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:16,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:17,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:17,221 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:07:17,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:17,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:07:17,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:07:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887458101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:18,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:18,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 56 [2021-12-18 20:07:18,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548585615] [2021-12-18 20:07:18,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:18,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-18 20:07:18,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-18 20:07:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2829, Unknown=10, NotChecked=0, Total=3080 [2021-12-18 20:07:18,035 INFO L87 Difference]: Start difference. First operand 1342 states and 1515 transitions. Second operand has 56 states, 56 states have (on average 4.946428571428571) internal successors, (277), 56 states have internal predecessors, (277), 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) [2021-12-18 20:07:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:19,137 INFO L93 Difference]: Finished difference Result 1671 states and 1865 transitions. [2021-12-18 20:07:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 20:07:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.946428571428571) internal successors, (277), 56 states have internal predecessors, (277), 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 102 [2021-12-18 20:07:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:19,139 INFO L225 Difference]: With dead ends: 1671 [2021-12-18 20:07:19,139 INFO L226 Difference]: Without dead ends: 1595 [2021-12-18 20:07:19,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=520, Invalid=5476, Unknown=10, NotChecked=0, Total=6006 [2021-12-18 20:07:19,139 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 87 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:19,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 786 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 526 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2021-12-18 20:07:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-12-18 20:07:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1592. [2021-12-18 20:07:19,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1589 states have (on average 1.1239773442416614) internal successors, (1786), 1591 states have internal predecessors, (1786), 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) [2021-12-18 20:07:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1786 transitions. [2021-12-18 20:07:19,149 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1786 transitions. Word has length 102 [2021-12-18 20:07:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:19,149 INFO L470 AbstractCegarLoop]: Abstraction has 1592 states and 1786 transitions. [2021-12-18 20:07:19,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.946428571428571) internal successors, (277), 56 states have internal predecessors, (277), 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) [2021-12-18 20:07:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1786 transitions. [2021-12-18 20:07:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-18 20:07:19,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:19,151 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:19,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:19,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:19,352 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:19,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:19,352 INFO L85 PathProgramCache]: Analyzing trace with hash 800383514, now seen corresponding path program 10 times [2021-12-18 20:07:19,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:19,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237130311] [2021-12-18 20:07:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:19,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 118 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:07:19,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:19,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237130311] [2021-12-18 20:07:19,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237130311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:19,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004157064] [2021-12-18 20:07:19,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:07:19,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:19,537 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:19,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-18 20:07:19,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:07:19,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-18 20:07:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:19,697 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:19,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:07:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 154 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:07:20,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 148 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:07:20,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004157064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:20,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:20,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 43 [2021-12-18 20:07:20,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520357180] [2021-12-18 20:07:20,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:20,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 20:07:20,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:20,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 20:07:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:07:20,602 INFO L87 Difference]: Start difference. First operand 1592 states and 1786 transitions. Second operand has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 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) [2021-12-18 20:07:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:21,787 INFO L93 Difference]: Finished difference Result 2451 states and 2722 transitions. [2021-12-18 20:07:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 20:07:21,787 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 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 103 [2021-12-18 20:07:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:21,789 INFO L225 Difference]: With dead ends: 2451 [2021-12-18 20:07:21,789 INFO L226 Difference]: Without dead ends: 2450 [2021-12-18 20:07:21,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1281, Invalid=4419, Unknown=0, NotChecked=0, Total=5700 [2021-12-18 20:07:21,790 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 1245 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:21,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 532 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:07:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-12-18 20:07:21,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2160. [2021-12-18 20:07:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2157 states have (on average 1.1307371349095967) internal successors, (2439), 2159 states have internal predecessors, (2439), 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) [2021-12-18 20:07:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2439 transitions. [2021-12-18 20:07:21,803 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2439 transitions. Word has length 103 [2021-12-18 20:07:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:21,804 INFO L470 AbstractCegarLoop]: Abstraction has 2160 states and 2439 transitions. [2021-12-18 20:07:21,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.604651162790698) internal successors, (198), 43 states have internal predecessors, (198), 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) [2021-12-18 20:07:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2439 transitions. [2021-12-18 20:07:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 20:07:21,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:21,805 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:21,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:22,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-18 20:07:22,011 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash -817121690, now seen corresponding path program 15 times [2021-12-18 20:07:22,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:22,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559219526] [2021-12-18 20:07:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:22,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:22,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559219526] [2021-12-18 20:07:22,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559219526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:22,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970814224] [2021-12-18 20:07:22,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:07:22,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:22,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:22,191 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:22,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-18 20:07:22,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-18 20:07:22,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:22,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-18 20:07:22,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:22,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:22,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:07:22,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 20:07:22,903 INFO L388 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 19 treesize of output 21 [2021-12-18 20:07:23,518 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-18 20:07:23,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-18 20:07:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 17 proven. 168 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 20:07:23,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:25,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:25,008 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:07:25,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:25,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:07:25,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:25,032 INFO L388 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 68 treesize of output 64 [2021-12-18 20:07:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-18 20:07:25,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970814224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:25,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:25,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 21] total 60 [2021-12-18 20:07:25,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621213155] [2021-12-18 20:07:25,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:25,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-18 20:07:25,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-18 20:07:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3376, Unknown=1, NotChecked=0, Total=3660 [2021-12-18 20:07:25,879 INFO L87 Difference]: Start difference. First operand 2160 states and 2439 transitions. Second operand has 61 states, 60 states have (on average 4.266666666666667) internal successors, (256), 61 states have internal predecessors, (256), 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) [2021-12-18 20:07:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:31,265 INFO L93 Difference]: Finished difference Result 3476 states and 3908 transitions. [2021-12-18 20:07:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-18 20:07:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 4.266666666666667) internal successors, (256), 61 states have internal predecessors, (256), 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 104 [2021-12-18 20:07:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:31,269 INFO L225 Difference]: With dead ends: 3476 [2021-12-18 20:07:31,269 INFO L226 Difference]: Without dead ends: 3476 [2021-12-18 20:07:31,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1932, Invalid=18373, Unknown=1, NotChecked=0, Total=20306 [2021-12-18 20:07:31,270 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 327 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 2139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 636 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:31,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 859 Invalid, 2139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1391 Invalid, 0 Unknown, 636 Unchecked, 0.6s Time] [2021-12-18 20:07:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-18 20:07:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2981. [2021-12-18 20:07:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2978 states have (on average 1.1326393552719947) internal successors, (3373), 2980 states have internal predecessors, (3373), 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) [2021-12-18 20:07:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 3373 transitions. [2021-12-18 20:07:31,302 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 3373 transitions. Word has length 104 [2021-12-18 20:07:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:31,302 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 3373 transitions. [2021-12-18 20:07:31,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 4.266666666666667) internal successors, (256), 61 states have internal predecessors, (256), 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) [2021-12-18 20:07:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 3373 transitions. [2021-12-18 20:07:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 20:07:31,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:31,305 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:31,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:31,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:31,522 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 779219134, now seen corresponding path program 16 times [2021-12-18 20:07:31,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:31,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861280069] [2021-12-18 20:07:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:31,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:31,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861280069] [2021-12-18 20:07:31,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861280069] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:31,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471597312] [2021-12-18 20:07:31,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:07:31,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:31,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:31,690 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:31,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-18 20:07:31,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:07:31,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 20:07:31,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:31,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:31,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:07:32,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-18 20:07:32,257 INFO L388 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 19 treesize of output 21 [2021-12-18 20:07:33,026 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-18 20:07:33,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-18 20:07:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 32 proven. 159 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:34,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:34,566 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:07:34,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:34,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:07:34,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:07:34,592 INFO L388 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 68 treesize of output 64 [2021-12-18 20:07:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 45 proven. 146 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:36,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471597312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:36,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:36,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 59 [2021-12-18 20:07:36,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715708054] [2021-12-18 20:07:36,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:36,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-18 20:07:36,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-18 20:07:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3212, Unknown=10, NotChecked=0, Total=3540 [2021-12-18 20:07:36,344 INFO L87 Difference]: Start difference. First operand 2981 states and 3373 transitions. Second operand has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 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) [2021-12-18 20:07:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:40,731 INFO L93 Difference]: Finished difference Result 4409 states and 4959 transitions. [2021-12-18 20:07:40,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-18 20:07:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 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 104 [2021-12-18 20:07:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:40,736 INFO L225 Difference]: With dead ends: 4409 [2021-12-18 20:07:40,737 INFO L226 Difference]: Without dead ends: 4409 [2021-12-18 20:07:40,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 183 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1378, Invalid=12891, Unknown=11, NotChecked=0, Total=14280 [2021-12-18 20:07:40,738 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 153 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:40,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 739 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 718 Invalid, 0 Unknown, 445 Unchecked, 0.3s Time] [2021-12-18 20:07:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2021-12-18 20:07:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 3743. [2021-12-18 20:07:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3740 states have (on average 1.1328877005347593) internal successors, (4237), 3742 states have internal predecessors, (4237), 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) [2021-12-18 20:07:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 4237 transitions. [2021-12-18 20:07:40,775 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 4237 transitions. Word has length 104 [2021-12-18 20:07:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:40,775 INFO L470 AbstractCegarLoop]: Abstraction has 3743 states and 4237 transitions. [2021-12-18 20:07:40,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 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) [2021-12-18 20:07:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 4237 transitions. [2021-12-18 20:07:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 20:07:40,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:40,778 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:40,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:40,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:40,996 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash -535539866, now seen corresponding path program 17 times [2021-12-18 20:07:40,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969746801] [2021-12-18 20:07:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:40,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:41,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969746801] [2021-12-18 20:07:41,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969746801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:41,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608265704] [2021-12-18 20:07:41,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:07:41,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:41,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:41,177 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:41,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-18 20:07:41,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-18 20:07:41,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:41,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-18 20:07:41,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:07:41,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:07:41,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 28 proven. 163 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:41,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 45 proven. 146 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:07:42,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608265704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:42,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:42,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2021-12-18 20:07:42,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502043282] [2021-12-18 20:07:42,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:42,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 20:07:42,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 20:07:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 20:07:42,679 INFO L87 Difference]: Start difference. First operand 3743 states and 4237 transitions. Second operand has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 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) [2021-12-18 20:07:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:43,984 INFO L93 Difference]: Finished difference Result 4025 states and 4508 transitions. [2021-12-18 20:07:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 20:07:43,984 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 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 104 [2021-12-18 20:07:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:43,990 INFO L225 Difference]: With dead ends: 4025 [2021-12-18 20:07:43,990 INFO L226 Difference]: Without dead ends: 4025 [2021-12-18 20:07:43,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=837, Invalid=3323, Unknown=0, NotChecked=0, Total=4160 [2021-12-18 20:07:43,991 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1104 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:43,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 533 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:07:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2021-12-18 20:07:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3640. [2021-12-18 20:07:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3637 states have (on average 1.1330767115754743) internal successors, (4121), 3639 states have internal predecessors, (4121), 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) [2021-12-18 20:07:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4121 transitions. [2021-12-18 20:07:44,036 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4121 transitions. Word has length 104 [2021-12-18 20:07:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:44,037 INFO L470 AbstractCegarLoop]: Abstraction has 3640 states and 4121 transitions. [2021-12-18 20:07:44,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.384615384615385) internal successors, (249), 40 states have internal predecessors, (249), 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) [2021-12-18 20:07:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4121 transitions. [2021-12-18 20:07:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 20:07:44,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:44,040 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:44,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:44,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-12-18 20:07:44,263 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash -348069625, now seen corresponding path program 18 times [2021-12-18 20:07:44,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:44,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907448497] [2021-12-18 20:07:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:44,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 166 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:07:44,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907448497] [2021-12-18 20:07:44,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907448497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:44,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589475181] [2021-12-18 20:07:44,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:07:44,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:44,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:44,481 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:44,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-18 20:07:44,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-18 20:07:44,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:44,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 20:07:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:44,804 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:07:44,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:07:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 28 proven. 153 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:07:45,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-18 20:07:46,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589475181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:46,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:46,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 39 [2021-12-18 20:07:46,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571393993] [2021-12-18 20:07:46,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:46,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-18 20:07:46,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:46,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-18 20:07:46,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2021-12-18 20:07:46,188 INFO L87 Difference]: Start difference. First operand 3640 states and 4121 transitions. Second operand has 40 states, 39 states have (on average 5.769230769230769) internal successors, (225), 40 states have internal predecessors, (225), 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) [2021-12-18 20:07:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:47,642 INFO L93 Difference]: Finished difference Result 3871 states and 4341 transitions. [2021-12-18 20:07:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-18 20:07:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 5.769230769230769) internal successors, (225), 40 states have internal predecessors, (225), 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 104 [2021-12-18 20:07:47,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:47,653 INFO L225 Difference]: With dead ends: 3871 [2021-12-18 20:07:47,653 INFO L226 Difference]: Without dead ends: 3871 [2021-12-18 20:07:47,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1073, Invalid=3757, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 20:07:47,654 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 988 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:47,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [988 Valid, 436 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:07:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-12-18 20:07:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3628. [2021-12-18 20:07:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3625 states have (on average 1.1315862068965516) internal successors, (4102), 3627 states have internal predecessors, (4102), 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) [2021-12-18 20:07:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 4102 transitions. [2021-12-18 20:07:47,683 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 4102 transitions. Word has length 104 [2021-12-18 20:07:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:47,683 INFO L470 AbstractCegarLoop]: Abstraction has 3628 states and 4102 transitions. [2021-12-18 20:07:47,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 5.769230769230769) internal successors, (225), 40 states have internal predecessors, (225), 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) [2021-12-18 20:07:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 4102 transitions. [2021-12-18 20:07:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-18 20:07:47,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:47,686 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:47,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:47,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:47,902 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:47,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:47,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1977334496, now seen corresponding path program 19 times [2021-12-18 20:07:47,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:47,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751915614] [2021-12-18 20:07:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:47,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 20:07:48,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751915614] [2021-12-18 20:07:48,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751915614] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:48,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135115284] [2021-12-18 20:07:48,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:07:48,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:48,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:48,082 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:48,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-18 20:07:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-18 20:07:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:48,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:07:48,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:07:48,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 28 proven. 147 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 20:07:48,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 45 proven. 130 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 20:07:49,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135115284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:49,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:49,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2021-12-18 20:07:49,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711996332] [2021-12-18 20:07:49,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:49,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 20:07:49,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:49,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 20:07:49,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:07:49,609 INFO L87 Difference]: Start difference. First operand 3628 states and 4102 transitions. Second operand has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 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) [2021-12-18 20:07:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:51,014 INFO L93 Difference]: Finished difference Result 3780 states and 4249 transitions. [2021-12-18 20:07:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 20:07:51,014 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 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 104 [2021-12-18 20:07:51,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:51,017 INFO L225 Difference]: With dead ends: 3780 [2021-12-18 20:07:51,017 INFO L226 Difference]: Without dead ends: 3780 [2021-12-18 20:07:51,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1061, Invalid=4051, Unknown=0, NotChecked=0, Total=5112 [2021-12-18 20:07:51,018 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 757 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:51,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 652 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:07:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-12-18 20:07:51,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3628. [2021-12-18 20:07:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3625 states have (on average 1.1310344827586207) internal successors, (4100), 3627 states have internal predecessors, (4100), 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) [2021-12-18 20:07:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 4100 transitions. [2021-12-18 20:07:51,044 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 4100 transitions. Word has length 104 [2021-12-18 20:07:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:51,044 INFO L470 AbstractCegarLoop]: Abstraction has 3628 states and 4100 transitions. [2021-12-18 20:07:51,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 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) [2021-12-18 20:07:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 4100 transitions. [2021-12-18 20:07:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-18 20:07:51,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:51,047 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:51,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:51,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-12-18 20:07:51,251 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash -257003894, now seen corresponding path program 11 times [2021-12-18 20:07:51,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:51,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376488159] [2021-12-18 20:07:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:51,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 28 proven. 209 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:51,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376488159] [2021-12-18 20:07:51,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376488159] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:51,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192044284] [2021-12-18 20:07:51,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:07:51,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:51,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:51,432 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:51,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-18 20:07:51,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 20:07:51,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:51,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 20:07:51,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:07:51,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:07:51,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 45 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:52,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 66 proven. 171 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:07:52,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192044284] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:52,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:52,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 42 [2021-12-18 20:07:52,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681689980] [2021-12-18 20:07:52,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:52,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 20:07:52,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:52,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 20:07:52,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:07:52,999 INFO L87 Difference]: Start difference. First operand 3628 states and 4100 transitions. Second operand has 43 states, 42 states have (on average 7.095238095238095) internal successors, (298), 43 states have internal predecessors, (298), 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) [2021-12-18 20:07:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:53,736 INFO L93 Difference]: Finished difference Result 6927 states and 7848 transitions. [2021-12-18 20:07:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-18 20:07:53,737 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 7.095238095238095) internal successors, (298), 43 states have internal predecessors, (298), 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 106 [2021-12-18 20:07:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:53,742 INFO L225 Difference]: With dead ends: 6927 [2021-12-18 20:07:53,743 INFO L226 Difference]: Without dead ends: 6927 [2021-12-18 20:07:53,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=515, Invalid=2347, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 20:07:53,743 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 551 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1226 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:53,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 703 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:07:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6927 states. [2021-12-18 20:07:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6927 to 5205. [2021-12-18 20:07:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5205 states, 5202 states have (on average 1.1312956555171088) internal successors, (5885), 5204 states have internal predecessors, (5885), 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) [2021-12-18 20:07:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 5885 transitions. [2021-12-18 20:07:53,791 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 5885 transitions. Word has length 106 [2021-12-18 20:07:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:53,791 INFO L470 AbstractCegarLoop]: Abstraction has 5205 states and 5885 transitions. [2021-12-18 20:07:53,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 7.095238095238095) internal successors, (298), 43 states have internal predecessors, (298), 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) [2021-12-18 20:07:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 5885 transitions. [2021-12-18 20:07:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-18 20:07:53,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:53,794 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:53,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:54,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:54,007 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1871804462, now seen corresponding path program 5 times [2021-12-18 20:07:54,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111854562] [2021-12-18 20:07:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:54,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 114 proven. 87 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:07:54,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111854562] [2021-12-18 20:07:54,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111854562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015185036] [2021-12-18 20:07:54,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:07:54,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:54,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:54,408 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:54,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-18 20:07:54,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-18 20:07:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:54,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 20:07:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:54,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:07:54,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:07:54,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 116 proven. 85 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:07:55,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 116 proven. 85 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-18 20:07:55,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015185036] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:55,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:55,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 17] total 46 [2021-12-18 20:07:55,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19405357] [2021-12-18 20:07:55,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:55,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-18 20:07:55,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:55,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-18 20:07:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1837, Unknown=0, NotChecked=0, Total=2070 [2021-12-18 20:07:55,807 INFO L87 Difference]: Start difference. First operand 5205 states and 5885 transitions. Second operand has 46 states, 46 states have (on average 4.717391304347826) internal successors, (217), 46 states have internal predecessors, (217), 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) [2021-12-18 20:07:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:07:57,827 INFO L93 Difference]: Finished difference Result 7172 states and 8005 transitions. [2021-12-18 20:07:57,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 20:07:57,827 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.717391304347826) internal successors, (217), 46 states have internal predecessors, (217), 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 107 [2021-12-18 20:07:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:07:57,832 INFO L225 Difference]: With dead ends: 7172 [2021-12-18 20:07:57,832 INFO L226 Difference]: Without dead ends: 7132 [2021-12-18 20:07:57,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1021, Invalid=4529, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 20:07:57,833 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 317 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:07:57,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 535 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:07:57,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7132 states. [2021-12-18 20:07:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7132 to 5074. [2021-12-18 20:07:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5071 states have (on average 1.1303490435811476) internal successors, (5732), 5073 states have internal predecessors, (5732), 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) [2021-12-18 20:07:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 5732 transitions. [2021-12-18 20:07:57,873 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 5732 transitions. Word has length 107 [2021-12-18 20:07:57,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:07:57,873 INFO L470 AbstractCegarLoop]: Abstraction has 5074 states and 5732 transitions. [2021-12-18 20:07:57,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.717391304347826) internal successors, (217), 46 states have internal predecessors, (217), 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) [2021-12-18 20:07:57,873 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 5732 transitions. [2021-12-18 20:07:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-18 20:07:57,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:07:57,875 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:07:57,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-12-18 20:07:58,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:58,076 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:07:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:07:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1448696733, now seen corresponding path program 11 times [2021-12-18 20:07:58,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:07:58,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285280332] [2021-12-18 20:07:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:07:58,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:07:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:07:58,237 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 114 proven. 85 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:07:58,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:07:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285280332] [2021-12-18 20:07:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285280332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:07:58,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645154579] [2021-12-18 20:07:58,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:07:58,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:07:58,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:07:58,249 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:07:58,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-18 20:07:58,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-18 20:07:58,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:07:58,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-18 20:07:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:07:58,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:07:58,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:07:58,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:07:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 154 proven. 45 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:07:59,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:07:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 154 proven. 45 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:07:59,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645154579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:07:59,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:07:59,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2021-12-18 20:07:59,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903042064] [2021-12-18 20:07:59,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:07:59,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 20:07:59,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:07:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 20:07:59,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-12-18 20:07:59,660 INFO L87 Difference]: Start difference. First operand 5074 states and 5732 transitions. Second operand has 41 states, 41 states have (on average 5.048780487804878) internal successors, (207), 41 states have internal predecessors, (207), 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) [2021-12-18 20:08:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:00,729 INFO L93 Difference]: Finished difference Result 6163 states and 6887 transitions. [2021-12-18 20:08:00,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-18 20:08:00,730 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.048780487804878) internal successors, (207), 41 states have internal predecessors, (207), 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 107 [2021-12-18 20:08:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:00,734 INFO L225 Difference]: With dead ends: 6163 [2021-12-18 20:08:00,734 INFO L226 Difference]: Without dead ends: 6158 [2021-12-18 20:08:00,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=925, Invalid=3365, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 20:08:00,735 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 418 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:00,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 333 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-18 20:08:00,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2021-12-18 20:08:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 5015. [2021-12-18 20:08:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5015 states, 5012 states have (on average 1.1300877893056664) internal successors, (5664), 5014 states have internal predecessors, (5664), 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) [2021-12-18 20:08:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5015 states to 5015 states and 5664 transitions. [2021-12-18 20:08:00,776 INFO L78 Accepts]: Start accepts. Automaton has 5015 states and 5664 transitions. Word has length 107 [2021-12-18 20:08:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 5015 states and 5664 transitions. [2021-12-18 20:08:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.048780487804878) internal successors, (207), 41 states have internal predecessors, (207), 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) [2021-12-18 20:08:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 5015 states and 5664 transitions. [2021-12-18 20:08:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 20:08:00,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:00,779 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:00,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:00,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:00,979 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash 57206156, now seen corresponding path program 20 times [2021-12-18 20:08:00,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:00,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881031183] [2021-12-18 20:08:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:00,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 35 proven. 187 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-18 20:08:01,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:01,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881031183] [2021-12-18 20:08:01,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881031183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:01,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004809144] [2021-12-18 20:08:01,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:08:01,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:01,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:01,310 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:01,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-18 20:08:01,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:08:01,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:01,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 20:08:01,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:01,736 INFO L388 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 14 treesize of output 10 [2021-12-18 20:08:02,403 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:08:02,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:08:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 14 proven. 206 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-18 20:08:02,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:02,811 INFO L388 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 15 treesize of output 13 [2021-12-18 20:08:02,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:08:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 14 proven. 206 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-18 20:08:02,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004809144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:02,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:02,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 51 [2021-12-18 20:08:02,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54451475] [2021-12-18 20:08:02,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:02,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 20:08:02,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 20:08:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2423, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 20:08:02,999 INFO L87 Difference]: Start difference. First operand 5015 states and 5664 transitions. Second operand has 51 states, 51 states have (on average 4.450980392156863) internal successors, (227), 51 states have internal predecessors, (227), 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) [2021-12-18 20:08:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:08,294 INFO L93 Difference]: Finished difference Result 6495 states and 7241 transitions. [2021-12-18 20:08:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-18 20:08:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.450980392156863) internal successors, (227), 51 states have internal predecessors, (227), 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 111 [2021-12-18 20:08:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:08,299 INFO L225 Difference]: With dead ends: 6495 [2021-12-18 20:08:08,299 INFO L226 Difference]: Without dead ends: 6432 [2021-12-18 20:08:08,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 194 SyntacticMatches, 4 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 6150 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1140, Invalid=21210, Unknown=0, NotChecked=0, Total=22350 [2021-12-18 20:08:08,301 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 990 mSDsluCounter, 3970 mSDsCounter, 0 mSdLazyCounter, 5179 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 4108 SdHoareTripleChecker+Invalid, 6394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 5179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1085 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:08,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 4108 Invalid, 6394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 5179 Invalid, 0 Unknown, 1085 Unchecked, 1.8s Time] [2021-12-18 20:08:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6432 states. [2021-12-18 20:08:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6432 to 5293. [2021-12-18 20:08:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 5290 states have (on average 1.1232514177693762) internal successors, (5942), 5292 states have internal predecessors, (5942), 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) [2021-12-18 20:08:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 5942 transitions. [2021-12-18 20:08:08,352 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 5942 transitions. Word has length 111 [2021-12-18 20:08:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:08,352 INFO L470 AbstractCegarLoop]: Abstraction has 5293 states and 5942 transitions. [2021-12-18 20:08:08,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.450980392156863) internal successors, (227), 51 states have internal predecessors, (227), 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) [2021-12-18 20:08:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 5942 transitions. [2021-12-18 20:08:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-18 20:08:08,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:08,356 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:08,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:08,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:08,557 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:08,557 INFO L85 PathProgramCache]: Analyzing trace with hash 918300768, now seen corresponding path program 12 times [2021-12-18 20:08:08,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:08,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453199289] [2021-12-18 20:08:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:08,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:09,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:09,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453199289] [2021-12-18 20:08:09,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453199289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:09,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773648592] [2021-12-18 20:08:09,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:08:09,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:09,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:09,697 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:09,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-18 20:08:10,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 20:08:10,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 20:08:10,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:10,396 INFO L388 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 14 treesize of output 10 [2021-12-18 20:08:10,700 INFO L388 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 15 treesize of output 7 [2021-12-18 20:08:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:08:10,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:10,941 INFO L388 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 15 treesize of output 13 [2021-12-18 20:08:10,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:08:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:08:11,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773648592] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:11,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:11,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 22] total 49 [2021-12-18 20:08:11,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263692911] [2021-12-18 20:08:11,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:11,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-18 20:08:11,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-18 20:08:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2021-12-18 20:08:11,181 INFO L87 Difference]: Start difference. First operand 5293 states and 5942 transitions. Second operand has 49 states, 49 states have (on average 3.489795918367347) internal successors, (171), 49 states have internal predecessors, (171), 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) [2021-12-18 20:08:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:18,245 INFO L93 Difference]: Finished difference Result 12527 states and 13988 transitions. [2021-12-18 20:08:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-12-18 20:08:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.489795918367347) internal successors, (171), 49 states have internal predecessors, (171), 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 111 [2021-12-18 20:08:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:18,257 INFO L225 Difference]: With dead ends: 12527 [2021-12-18 20:08:18,258 INFO L226 Difference]: Without dead ends: 12473 [2021-12-18 20:08:18,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 202 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2706 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1062, Invalid=12048, Unknown=0, NotChecked=0, Total=13110 [2021-12-18 20:08:18,259 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 2694 mSDsluCounter, 6398 mSDsCounter, 0 mSdLazyCounter, 6995 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2694 SdHoareTripleChecker+Valid, 6624 SdHoareTripleChecker+Invalid, 7226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 6995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:18,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2694 Valid, 6624 Invalid, 7226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 6995 Invalid, 0 Unknown, 38 Unchecked, 3.0s Time] [2021-12-18 20:08:18,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12473 states. [2021-12-18 20:08:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12473 to 6653. [2021-12-18 20:08:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6653 states, 6650 states have (on average 1.1290225563909775) internal successors, (7508), 6652 states have internal predecessors, (7508), 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) [2021-12-18 20:08:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6653 states to 6653 states and 7508 transitions. [2021-12-18 20:08:18,335 INFO L78 Accepts]: Start accepts. Automaton has 6653 states and 7508 transitions. Word has length 111 [2021-12-18 20:08:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:18,335 INFO L470 AbstractCegarLoop]: Abstraction has 6653 states and 7508 transitions. [2021-12-18 20:08:18,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.489795918367347) internal successors, (171), 49 states have internal predecessors, (171), 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) [2021-12-18 20:08:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6653 states and 7508 transitions. [2021-12-18 20:08:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-18 20:08:18,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:18,358 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:18,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:18,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-12-18 20:08:18,567 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 406677484, now seen corresponding path program 2 times [2021-12-18 20:08:18,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850533186] [2021-12-18 20:08:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:18,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 58 proven. 193 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:08:18,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850533186] [2021-12-18 20:08:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850533186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488700556] [2021-12-18 20:08:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:08:18,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:18,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:18,809 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:18,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-18 20:08:19,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:08:19,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:19,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 20:08:19,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:19,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:08:19,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:08:19,325 INFO L388 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 17 treesize of output 19 [2021-12-18 20:08:19,565 INFO L388 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 15 treesize of output 7 [2021-12-18 20:08:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 58 proven. 193 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:08:19,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:19,765 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2761 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2761) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-18 20:08:19,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:19,770 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:08:19,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:19,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:08:19,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:08:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 58 proven. 193 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:08:20,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488700556] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:20,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:20,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 34 [2021-12-18 20:08:20,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102537867] [2021-12-18 20:08:20,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:20,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-18 20:08:20,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-18 20:08:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=961, Unknown=1, NotChecked=62, Total=1122 [2021-12-18 20:08:20,038 INFO L87 Difference]: Start difference. First operand 6653 states and 7508 transitions. Second operand has 34 states, 34 states have (on average 4.823529411764706) internal successors, (164), 34 states have internal predecessors, (164), 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) [2021-12-18 20:08:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:20,711 INFO L93 Difference]: Finished difference Result 7184 states and 8052 transitions. [2021-12-18 20:08:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-18 20:08:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.823529411764706) internal successors, (164), 34 states have internal predecessors, (164), 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 113 [2021-12-18 20:08:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:20,717 INFO L225 Difference]: With dead ends: 7184 [2021-12-18 20:08:20,718 INFO L226 Difference]: Without dead ends: 6682 [2021-12-18 20:08:20,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=1937, Unknown=1, NotChecked=90, Total=2256 [2021-12-18 20:08:20,718 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 271 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:20,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 817 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 913 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2021-12-18 20:08:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-12-18 20:08:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6234. [2021-12-18 20:08:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6231 states have (on average 1.1258225004012197) internal successors, (7015), 6233 states have internal predecessors, (7015), 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) [2021-12-18 20:08:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 7015 transitions. [2021-12-18 20:08:20,774 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 7015 transitions. Word has length 113 [2021-12-18 20:08:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:20,774 INFO L470 AbstractCegarLoop]: Abstraction has 6234 states and 7015 transitions. [2021-12-18 20:08:20,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.823529411764706) internal successors, (164), 34 states have internal predecessors, (164), 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) [2021-12-18 20:08:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 7015 transitions. [2021-12-18 20:08:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-18 20:08:20,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:20,778 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:20,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:20,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-12-18 20:08:20,979 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2135805850, now seen corresponding path program 21 times [2021-12-18 20:08:20,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:20,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589635230] [2021-12-18 20:08:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:20,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 35 proven. 217 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:08:21,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589635230] [2021-12-18 20:08:21,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589635230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:21,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86064309] [2021-12-18 20:08:21,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:08:21,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:21,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:21,321 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:21,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-18 20:08:21,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-18 20:08:21,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:21,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 20:08:21,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:21,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:08:21,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:08:21,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-18 20:08:21,864 INFO L388 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 18 treesize of output 20 [2021-12-18 20:08:22,244 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-12-18 20:08:22,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 51 [2021-12-18 20:08:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 4 proven. 107 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-18 20:08:22,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:24,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:24,770 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2021-12-18 20:08:24,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2021-12-18 20:08:24,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:24,800 INFO L388 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 64 treesize of output 62 [2021-12-18 20:08:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-12-18 20:08:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86064309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:25,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:25,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 48 [2021-12-18 20:08:25,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612414612] [2021-12-18 20:08:25,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:25,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-18 20:08:25,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-18 20:08:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2104, Unknown=24, NotChecked=0, Total=2256 [2021-12-18 20:08:25,779 INFO L87 Difference]: Start difference. First operand 6234 states and 7015 transitions. Second operand has 48 states, 48 states have (on average 4.0625) internal successors, (195), 48 states have internal predecessors, (195), 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) [2021-12-18 20:08:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:30,233 INFO L93 Difference]: Finished difference Result 6408 states and 7079 transitions. [2021-12-18 20:08:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-18 20:08:30,234 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.0625) internal successors, (195), 48 states have internal predecessors, (195), 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 115 [2021-12-18 20:08:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:30,238 INFO L225 Difference]: With dead ends: 6408 [2021-12-18 20:08:30,238 INFO L226 Difference]: Without dead ends: 4818 [2021-12-18 20:08:30,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 206 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3553 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1479, Invalid=15006, Unknown=27, NotChecked=0, Total=16512 [2021-12-18 20:08:30,239 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 107 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:30,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 513 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2291 Invalid, 0 Unknown, 224 Unchecked, 0.9s Time] [2021-12-18 20:08:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4818 states. [2021-12-18 20:08:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4818 to 1980. [2021-12-18 20:08:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1978 states have (on average 1.1137512639029323) internal successors, (2203), 1979 states have internal predecessors, (2203), 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) [2021-12-18 20:08:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 2203 transitions. [2021-12-18 20:08:30,265 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 2203 transitions. Word has length 115 [2021-12-18 20:08:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:30,266 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 2203 transitions. [2021-12-18 20:08:30,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.0625) internal successors, (195), 48 states have internal predecessors, (195), 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) [2021-12-18 20:08:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 2203 transitions. [2021-12-18 20:08:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-18 20:08:30,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:30,268 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:30,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:30,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:30,493 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:30,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:30,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2036345716, now seen corresponding path program 6 times [2021-12-18 20:08:30,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:30,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139735911] [2021-12-18 20:08:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:30,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 28 proven. 192 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 20:08:30,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139735911] [2021-12-18 20:08:30,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139735911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153656490] [2021-12-18 20:08:30,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:08:30,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:30,760 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:30,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-18 20:08:31,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-18 20:08:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:31,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-18 20:08:31,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 45 proven. 175 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 20:08:31,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:32,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 11 [2021-12-18 20:08:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 66 proven. 154 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-18 20:08:32,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153656490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:32,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:32,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 18] total 51 [2021-12-18 20:08:32,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94493356] [2021-12-18 20:08:32,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:32,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 20:08:32,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 20:08:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2357, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 20:08:32,508 INFO L87 Difference]: Start difference. First operand 1980 states and 2203 transitions. Second operand has 52 states, 51 states have (on average 5.372549019607843) internal successors, (274), 52 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:34,056 INFO L93 Difference]: Finished difference Result 2400 states and 2635 transitions. [2021-12-18 20:08:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 20:08:34,056 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.372549019607843) internal successors, (274), 52 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-18 20:08:34,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:34,058 INFO L225 Difference]: With dead ends: 2400 [2021-12-18 20:08:34,058 INFO L226 Difference]: Without dead ends: 2399 [2021-12-18 20:08:34,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1099, Invalid=4601, Unknown=0, NotChecked=0, Total=5700 [2021-12-18 20:08:34,059 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 925 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:34,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 830 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:08:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-12-18 20:08:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2021. [2021-12-18 20:08:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2021 states, 2019 states have (on average 1.1084695393759287) internal successors, (2238), 2020 states have internal predecessors, (2238), 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) [2021-12-18 20:08:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2238 transitions. [2021-12-18 20:08:34,078 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2238 transitions. Word has length 115 [2021-12-18 20:08:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:34,078 INFO L470 AbstractCegarLoop]: Abstraction has 2021 states and 2238 transitions. [2021-12-18 20:08:34,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.372549019607843) internal successors, (274), 52 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 20:08:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2238 transitions. [2021-12-18 20:08:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-18 20:08:34,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:34,080 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:34,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-18 20:08:34,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:34,281 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:34,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1613237987, now seen corresponding path program 13 times [2021-12-18 20:08:34,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:34,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078409397] [2021-12-18 20:08:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:34,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:08:34,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078409397] [2021-12-18 20:08:34,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078409397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:34,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792140571] [2021-12-18 20:08:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:08:34,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:34,538 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:34,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-18 20:08:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-18 20:08:34,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:08:35,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:35,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-18 20:08:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-18 20:08:35,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792140571] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:35,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:35,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 42 [2021-12-18 20:08:35,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751214005] [2021-12-18 20:08:35,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:35,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 20:08:35,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 20:08:35,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2021-12-18 20:08:35,747 INFO L87 Difference]: Start difference. First operand 2021 states and 2238 transitions. Second operand has 43 states, 42 states have (on average 4.690476190476191) internal successors, (197), 43 states have internal predecessors, (197), 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) [2021-12-18 20:08:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:37,693 INFO L93 Difference]: Finished difference Result 2670 states and 2943 transitions. [2021-12-18 20:08:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-18 20:08:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.690476190476191) internal successors, (197), 43 states have internal predecessors, (197), 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 115 [2021-12-18 20:08:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:37,697 INFO L225 Difference]: With dead ends: 2670 [2021-12-18 20:08:37,697 INFO L226 Difference]: Without dead ends: 2670 [2021-12-18 20:08:37,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=813, Invalid=3477, Unknown=0, NotChecked=0, Total=4290 [2021-12-18 20:08:37,698 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 916 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 3159 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 3237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:37,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 1586 Invalid, 3237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3159 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-18 20:08:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-12-18 20:08:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2397. [2021-12-18 20:08:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2395 states have (on average 1.11482254697286) internal successors, (2670), 2396 states have internal predecessors, (2670), 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) [2021-12-18 20:08:37,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 2670 transitions. [2021-12-18 20:08:37,712 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 2670 transitions. Word has length 115 [2021-12-18 20:08:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:37,712 INFO L470 AbstractCegarLoop]: Abstraction has 2397 states and 2670 transitions. [2021-12-18 20:08:37,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.690476190476191) internal successors, (197), 43 states have internal predecessors, (197), 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) [2021-12-18 20:08:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 2670 transitions. [2021-12-18 20:08:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-18 20:08:37,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:37,713 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:37,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:37,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:37,926 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:37,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash 16289344, now seen corresponding path program 12 times [2021-12-18 20:08:37,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:37,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111598305] [2021-12-18 20:08:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:37,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:38,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111598305] [2021-12-18 20:08:38,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111598305] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415857637] [2021-12-18 20:08:38,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:08:38,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:38,425 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:38,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-18 20:08:38,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-18 20:08:38,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 20:08:38,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:38,689 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:38,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:08:39,263 INFO L388 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 14 treesize of output 10 [2021-12-18 20:08:39,324 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:08:39,324 INFO L388 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 17 treesize of output 23 [2021-12-18 20:08:39,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 3 [2021-12-18 20:08:42,587 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-18 20:08:42,588 INFO L388 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 13 treesize of output 13 [2021-12-18 20:08:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:08:42,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:08:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:42,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:43,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:43,512 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:08:43,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:43,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:08:43,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:08:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:44,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415857637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:44,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:44,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 69 [2021-12-18 20:08:44,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297355819] [2021-12-18 20:08:44,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:44,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 20:08:44,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:44,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 20:08:44,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4482, Unknown=1, NotChecked=0, Total=4692 [2021-12-18 20:08:44,828 INFO L87 Difference]: Start difference. First operand 2397 states and 2670 transitions. Second operand has 69 states, 69 states have (on average 4.579710144927536) internal successors, (316), 69 states have internal predecessors, (316), 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) [2021-12-18 20:08:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:47,239 INFO L93 Difference]: Finished difference Result 3757 states and 4148 transitions. [2021-12-18 20:08:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-18 20:08:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.579710144927536) internal successors, (316), 69 states have internal predecessors, (316), 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 117 [2021-12-18 20:08:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:47,242 INFO L225 Difference]: With dead ends: 3757 [2021-12-18 20:08:47,242 INFO L226 Difference]: Without dead ends: 2762 [2021-12-18 20:08:47,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=504, Invalid=10415, Unknown=1, NotChecked=0, Total=10920 [2021-12-18 20:08:47,243 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 108 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 739 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:47,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1466 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1009 Invalid, 0 Unknown, 739 Unchecked, 0.4s Time] [2021-12-18 20:08:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-12-18 20:08:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2754. [2021-12-18 20:08:47,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2752 states have (on average 1.1130087209302326) internal successors, (3063), 2753 states have internal predecessors, (3063), 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) [2021-12-18 20:08:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 3063 transitions. [2021-12-18 20:08:47,265 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 3063 transitions. Word has length 117 [2021-12-18 20:08:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:47,265 INFO L470 AbstractCegarLoop]: Abstraction has 2754 states and 3063 transitions. [2021-12-18 20:08:47,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.579710144927536) internal successors, (316), 69 states have internal predecessors, (316), 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) [2021-12-18 20:08:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 3063 transitions. [2021-12-18 20:08:47,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-18 20:08:47,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:47,267 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:47,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-12-18 20:08:47,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:47,468 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash -142572733, now seen corresponding path program 13 times [2021-12-18 20:08:47,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:47,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518820763] [2021-12-18 20:08:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:47,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:47,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518820763] [2021-12-18 20:08:47,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518820763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548180787] [2021-12-18 20:08:47,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:08:47,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:47,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:47,688 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:47,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-18 20:08:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-18 20:08:47,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:08:47,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:08:47,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:08:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:48,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 91 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:08:49,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548180787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:49,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:49,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2021-12-18 20:08:49,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388117481] [2021-12-18 20:08:49,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:49,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-18 20:08:49,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-18 20:08:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2021-12-18 20:08:49,579 INFO L87 Difference]: Start difference. First operand 2754 states and 3063 transitions. Second operand has 52 states, 51 states have (on average 6.784313725490196) internal successors, (346), 52 states have internal predecessors, (346), 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) [2021-12-18 20:08:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:50,640 INFO L93 Difference]: Finished difference Result 4395 states and 4884 transitions. [2021-12-18 20:08:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-18 20:08:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 6.784313725490196) internal successors, (346), 52 states have internal predecessors, (346), 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 121 [2021-12-18 20:08:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:50,644 INFO L225 Difference]: With dead ends: 4395 [2021-12-18 20:08:50,645 INFO L226 Difference]: Without dead ends: 4395 [2021-12-18 20:08:50,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=821, Invalid=4009, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 20:08:50,645 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 703 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:50,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 1001 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:08:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2021-12-18 20:08:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 3040. [2021-12-18 20:08:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 3038 states have (on average 1.1129032258064515) internal successors, (3381), 3039 states have internal predecessors, (3381), 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) [2021-12-18 20:08:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 3381 transitions. [2021-12-18 20:08:50,669 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 3381 transitions. Word has length 121 [2021-12-18 20:08:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:50,670 INFO L470 AbstractCegarLoop]: Abstraction has 3040 states and 3381 transitions. [2021-12-18 20:08:50,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 6.784313725490196) internal successors, (346), 52 states have internal predecessors, (346), 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) [2021-12-18 20:08:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 3381 transitions. [2021-12-18 20:08:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-18 20:08:50,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:50,672 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:50,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-18 20:08:50,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-12-18 20:08:50,873 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1231743075, now seen corresponding path program 14 times [2021-12-18 20:08:50,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:50,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468407224] [2021-12-18 20:08:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:50,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 157 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:08:51,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468407224] [2021-12-18 20:08:51,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468407224] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693462179] [2021-12-18 20:08:51,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:08:51,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:51,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:51,074 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:51,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-12-18 20:08:51,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:08:51,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:51,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-18 20:08:51,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:08:51,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:08:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:08:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 204 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:08:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 169 proven. 101 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:08:52,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693462179] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:52,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:52,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 45 [2021-12-18 20:08:52,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846087992] [2021-12-18 20:08:52,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:52,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 20:08:52,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 20:08:52,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-12-18 20:08:52,304 INFO L87 Difference]: Start difference. First operand 3040 states and 3381 transitions. Second operand has 45 states, 45 states have (on average 4.844444444444444) internal successors, (218), 45 states have internal predecessors, (218), 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) [2021-12-18 20:08:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:08:53,420 INFO L93 Difference]: Finished difference Result 4697 states and 5142 transitions. [2021-12-18 20:08:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 20:08:53,420 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.844444444444444) internal successors, (218), 45 states have internal predecessors, (218), 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 122 [2021-12-18 20:08:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:08:53,424 INFO L225 Difference]: With dead ends: 4697 [2021-12-18 20:08:53,424 INFO L226 Difference]: Without dead ends: 4276 [2021-12-18 20:08:53,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1033, Invalid=3937, Unknown=0, NotChecked=0, Total=4970 [2021-12-18 20:08:53,425 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 328 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:08:53,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 602 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 20:08:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-12-18 20:08:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3098. [2021-12-18 20:08:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3096 states have (on average 1.1120801033591732) internal successors, (3443), 3097 states have internal predecessors, (3443), 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) [2021-12-18 20:08:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 3443 transitions. [2021-12-18 20:08:53,455 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 3443 transitions. Word has length 122 [2021-12-18 20:08:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:08:53,456 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 3443 transitions. [2021-12-18 20:08:53,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.844444444444444) internal successors, (218), 45 states have internal predecessors, (218), 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) [2021-12-18 20:08:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 3443 transitions. [2021-12-18 20:08:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-18 20:08:53,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:08:53,460 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:08:53,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-12-18 20:08:53,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:53,672 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:08:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:08:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -723727238, now seen corresponding path program 15 times [2021-12-18 20:08:53,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:08:53,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078566640] [2021-12-18 20:08:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:08:53,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:08:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:08:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 36 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:08:54,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:08:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078566640] [2021-12-18 20:08:54,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078566640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:08:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253181044] [2021-12-18 20:08:54,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:08:54,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:08:54,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:08:54,966 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:08:54,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-12-18 20:08:55,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 20:08:55,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:08:55,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-18 20:08:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:08:55,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:08:56,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:08:56,181 INFO L388 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 17 treesize of output 19 [2021-12-18 20:08:57,521 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-18 20:08:57,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-18 20:08:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 8 proven. 287 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:08:57,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:08:58,952 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_3210 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3210))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (= 0 .cse0) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) .cse0)))))) is different from false [2021-12-18 20:08:58,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:58,958 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:08:58,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:58,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:08:58,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:08:58,982 INFO L388 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 68 treesize of output 64 [2021-12-18 20:08:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 8 proven. 287 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:08:59,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253181044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:08:59,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:08:59,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29, 29] total 79 [2021-12-18 20:08:59,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5825748] [2021-12-18 20:08:59,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:08:59,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 20:08:59,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:08:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 20:08:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5790, Unknown=1, NotChecked=152, Total=6162 [2021-12-18 20:08:59,746 INFO L87 Difference]: Start difference. First operand 3098 states and 3443 transitions. Second operand has 79 states, 79 states have (on average 3.6455696202531644) internal successors, (288), 79 states have internal predecessors, (288), 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) [2021-12-18 20:09:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:05,329 INFO L93 Difference]: Finished difference Result 3538 states and 3926 transitions. [2021-12-18 20:09:05,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-18 20:09:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.6455696202531644) internal successors, (288), 79 states have internal predecessors, (288), 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 126 [2021-12-18 20:09:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:05,333 INFO L225 Difference]: With dead ends: 3538 [2021-12-18 20:09:05,333 INFO L226 Difference]: Without dead ends: 3535 [2021-12-18 20:09:05,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 206 SyntacticMatches, 12 SemanticMatches, 129 ConstructedPredicates, 1 IntricatePredicates, 10 DeprecatedPredicates, 3256 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=836, Invalid=15937, Unknown=1, NotChecked=256, Total=17030 [2021-12-18 20:09:05,334 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 311 mSDsluCounter, 4422 mSDsCounter, 0 mSdLazyCounter, 3066 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 4512 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1785 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:05,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 4512 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3066 Invalid, 0 Unknown, 1785 Unchecked, 1.3s Time] [2021-12-18 20:09:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3535 states. [2021-12-18 20:09:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3535 to 3202. [2021-12-18 20:09:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3200 states have (on average 1.1134375) internal successors, (3563), 3201 states have internal predecessors, (3563), 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) [2021-12-18 20:09:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 3563 transitions. [2021-12-18 20:09:05,353 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 3563 transitions. Word has length 126 [2021-12-18 20:09:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:05,353 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 3563 transitions. [2021-12-18 20:09:05,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.6455696202531644) internal successors, (288), 79 states have internal predecessors, (288), 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) [2021-12-18 20:09:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 3563 transitions. [2021-12-18 20:09:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-18 20:09:05,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:05,355 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:05,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-12-18 20:09:05,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-12-18 20:09:05,556 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1817496279, now seen corresponding path program 16 times [2021-12-18 20:09:05,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:05,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769947623] [2021-12-18 20:09:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:05,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 36 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:06,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769947623] [2021-12-18 20:09:06,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769947623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:06,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553590245] [2021-12-18 20:09:06,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:09:06,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:06,220 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:06,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-12-18 20:09:06,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:09:06,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 20:09:06,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:06,452 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:09:06,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:09:07,002 INFO L388 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 13 treesize of output 9 [2021-12-18 20:09:07,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:09:07,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:09:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 190 proven. 105 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 20:09:07,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:08,820 INFO L388 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 13 treesize of output 11 [2021-12-18 20:09:08,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:09:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 177 proven. 118 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 20:09:10,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553590245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:10,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:10,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 25] total 75 [2021-12-18 20:09:10,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367193116] [2021-12-18 20:09:10,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:10,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-18 20:09:10,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-18 20:09:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=5140, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 20:09:10,041 INFO L87 Difference]: Start difference. First operand 3202 states and 3563 transitions. Second operand has 75 states, 75 states have (on average 4.16) internal successors, (312), 75 states have internal predecessors, (312), 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) [2021-12-18 20:09:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:21,130 INFO L93 Difference]: Finished difference Result 3503 states and 3889 transitions. [2021-12-18 20:09:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-12-18 20:09:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.16) internal successors, (312), 75 states have internal predecessors, (312), 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 130 [2021-12-18 20:09:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:21,133 INFO L225 Difference]: With dead ends: 3503 [2021-12-18 20:09:21,133 INFO L226 Difference]: Without dead ends: 3500 [2021-12-18 20:09:21,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 229 SyntacticMatches, 6 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9752 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=3420, Invalid=31362, Unknown=0, NotChecked=0, Total=34782 [2021-12-18 20:09:21,135 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1149 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 3570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:21,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 2540 Invalid, 3570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 2870 Invalid, 0 Unknown, 410 Unchecked, 1.2s Time] [2021-12-18 20:09:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-12-18 20:09:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 3206. [2021-12-18 20:09:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3204 states have (on average 1.1136079900124844) internal successors, (3568), 3205 states have internal predecessors, (3568), 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) [2021-12-18 20:09:21,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 3568 transitions. [2021-12-18 20:09:21,164 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 3568 transitions. Word has length 130 [2021-12-18 20:09:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:21,164 INFO L470 AbstractCegarLoop]: Abstraction has 3206 states and 3568 transitions. [2021-12-18 20:09:21,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.16) internal successors, (312), 75 states have internal predecessors, (312), 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) [2021-12-18 20:09:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 3568 transitions. [2021-12-18 20:09:21,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-18 20:09:21,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:21,167 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:21,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:21,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-12-18 20:09:21,368 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:21,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash -716523752, now seen corresponding path program 3 times [2021-12-18 20:09:21,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:21,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549400012] [2021-12-18 20:09:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:21,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:09:21,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:21,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549400012] [2021-12-18 20:09:21,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549400012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:21,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375502992] [2021-12-18 20:09:21,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:09:21,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:21,650 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:21,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-12-18 20:09:21,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-18 20:09:21,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-18 20:09:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:21,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:09:22,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:09:22,366 INFO L388 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 17 treesize of output 19 [2021-12-18 20:09:23,147 INFO L388 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 15 treesize of output 7 [2021-12-18 20:09:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:09:23,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:23,357 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3351 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3351) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 6)) 0)) is different from false [2021-12-18 20:09:23,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:23,362 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:09:23,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:23,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:09:23,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:09:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 20:09:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375502992] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:23,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:23,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 41 [2021-12-18 20:09:23,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986323621] [2021-12-18 20:09:23,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:23,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-18 20:09:23,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-18 20:09:23,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1451, Unknown=1, NotChecked=76, Total=1640 [2021-12-18 20:09:23,650 INFO L87 Difference]: Start difference. First operand 3206 states and 3568 transitions. Second operand has 41 states, 41 states have (on average 5.634146341463414) internal successors, (231), 41 states have internal predecessors, (231), 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) [2021-12-18 20:09:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:24,236 INFO L93 Difference]: Finished difference Result 3664 states and 4059 transitions. [2021-12-18 20:09:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-18 20:09:24,236 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.634146341463414) internal successors, (231), 41 states have internal predecessors, (231), 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 132 [2021-12-18 20:09:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:24,238 INFO L225 Difference]: With dead ends: 3664 [2021-12-18 20:09:24,238 INFO L226 Difference]: Without dead ends: 2439 [2021-12-18 20:09:24,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 240 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=179, Invalid=2274, Unknown=1, NotChecked=96, Total=2550 [2021-12-18 20:09:24,239 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 70 mSDsluCounter, 1541 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 837 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:24,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1604 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 740 Invalid, 0 Unknown, 837 Unchecked, 0.3s Time] [2021-12-18 20:09:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2021-12-18 20:09:24,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2439. [2021-12-18 20:09:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2439 states, 2437 states have (on average 1.1153057037340992) internal successors, (2718), 2438 states have internal predecessors, (2718), 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) [2021-12-18 20:09:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2439 states to 2439 states and 2718 transitions. [2021-12-18 20:09:24,257 INFO L78 Accepts]: Start accepts. Automaton has 2439 states and 2718 transitions. Word has length 132 [2021-12-18 20:09:24,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:24,257 INFO L470 AbstractCegarLoop]: Abstraction has 2439 states and 2718 transitions. [2021-12-18 20:09:24,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.634146341463414) internal successors, (231), 41 states have internal predecessors, (231), 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) [2021-12-18 20:09:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2439 states and 2718 transitions. [2021-12-18 20:09:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-18 20:09:24,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:24,259 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:24,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:24,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-12-18 20:09:24,475 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1395817447, now seen corresponding path program 14 times [2021-12-18 20:09:24,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:24,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22994247] [2021-12-18 20:09:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:24,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:24,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:24,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22994247] [2021-12-18 20:09:24,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22994247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:24,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941351337] [2021-12-18 20:09:24,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:09:24,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:24,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:24,807 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:24,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-12-18 20:09:25,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:09:25,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:25,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-18 20:09:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:25,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:09:25,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:09:25,355 INFO L388 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 16 treesize of output 18 [2021-12-18 20:09:25,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:25,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-12-18 20:09:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:25,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:26,045 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3405 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3405) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 7)) 0)) is different from false [2021-12-18 20:09:26,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:26,049 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:09:26,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:26,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:09:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:09:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941351337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:26,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 45 [2021-12-18 20:09:26,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596398998] [2021-12-18 20:09:26,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:26,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-18 20:09:26,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:26,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-18 20:09:26,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1773, Unknown=1, NotChecked=84, Total=1980 [2021-12-18 20:09:26,506 INFO L87 Difference]: Start difference. First operand 2439 states and 2718 transitions. Second operand has 45 states, 45 states have (on average 5.711111111111111) internal successors, (257), 45 states have internal predecessors, (257), 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) [2021-12-18 20:09:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:27,784 INFO L93 Difference]: Finished difference Result 4427 states and 4905 transitions. [2021-12-18 20:09:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 20:09:27,784 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.711111111111111) internal successors, (257), 45 states have internal predecessors, (257), 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 132 [2021-12-18 20:09:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:27,787 INFO L225 Difference]: With dead ends: 4427 [2021-12-18 20:09:27,787 INFO L226 Difference]: Without dead ends: 3469 [2021-12-18 20:09:27,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=236, Invalid=3427, Unknown=1, NotChecked=118, Total=3782 [2021-12-18 20:09:27,788 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 141 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:27,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 1862 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2462 Invalid, 0 Unknown, 113 Unchecked, 0.8s Time] [2021-12-18 20:09:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-12-18 20:09:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 3410. [2021-12-18 20:09:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3408 states have (on average 1.1164906103286385) internal successors, (3805), 3409 states have internal predecessors, (3805), 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) [2021-12-18 20:09:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 3805 transitions. [2021-12-18 20:09:27,812 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 3805 transitions. Word has length 132 [2021-12-18 20:09:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:27,812 INFO L470 AbstractCegarLoop]: Abstraction has 3410 states and 3805 transitions. [2021-12-18 20:09:27,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.711111111111111) internal successors, (257), 45 states have internal predecessors, (257), 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) [2021-12-18 20:09:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 3805 transitions. [2021-12-18 20:09:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-18 20:09:27,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:27,814 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:27,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-12-18 20:09:28,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:28,015 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1681188017, now seen corresponding path program 7 times [2021-12-18 20:09:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302058346] [2021-12-18 20:09:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:28,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 9 proven. 404 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 20:09:28,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:28,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302058346] [2021-12-18 20:09:28,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302058346] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:28,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479391172] [2021-12-18 20:09:28,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:09:28,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:28,987 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:28,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-12-18 20:09:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:29,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-18 20:09:29,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:29,770 INFO L388 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 14 treesize of output 10 [2021-12-18 20:09:31,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:09:31,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:09:31,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:09:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 41 proven. 279 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-18 20:09:31,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:32,368 INFO L388 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 15 treesize of output 13 [2021-12-18 20:09:32,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:09:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 41 proven. 279 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-18 20:09:33,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479391172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:33,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:33,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 24, 24] total 77 [2021-12-18 20:09:33,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202171491] [2021-12-18 20:09:33,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:33,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-18 20:09:33,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-18 20:09:33,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5639, Unknown=0, NotChecked=0, Total=5852 [2021-12-18 20:09:33,159 INFO L87 Difference]: Start difference. First operand 3410 states and 3805 transitions. Second operand has 77 states, 77 states have (on average 4.012987012987013) internal successors, (309), 77 states have internal predecessors, (309), 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) [2021-12-18 20:09:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:39,149 INFO L93 Difference]: Finished difference Result 3474 states and 3826 transitions. [2021-12-18 20:09:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-18 20:09:39,149 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 4.012987012987013) internal successors, (309), 77 states have internal predecessors, (309), 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 133 [2021-12-18 20:09:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:39,151 INFO L225 Difference]: With dead ends: 3474 [2021-12-18 20:09:39,151 INFO L226 Difference]: Without dead ends: 2851 [2021-12-18 20:09:39,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4391 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=954, Invalid=21098, Unknown=0, NotChecked=0, Total=22052 [2021-12-18 20:09:39,152 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 518 mSDsluCounter, 5721 mSDsCounter, 0 mSdLazyCounter, 4003 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 5859 SdHoareTripleChecker+Invalid, 5379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1276 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:39,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 5859 Invalid, 5379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 4003 Invalid, 0 Unknown, 1276 Unchecked, 1.6s Time] [2021-12-18 20:09:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-12-18 20:09:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2478. [2021-12-18 20:09:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2476 states have (on average 1.1090468497576738) internal successors, (2746), 2477 states have internal predecessors, (2746), 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) [2021-12-18 20:09:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 2746 transitions. [2021-12-18 20:09:39,167 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 2746 transitions. Word has length 133 [2021-12-18 20:09:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:39,167 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 2746 transitions. [2021-12-18 20:09:39,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 4.012987012987013) internal successors, (309), 77 states have internal predecessors, (309), 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) [2021-12-18 20:09:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 2746 transitions. [2021-12-18 20:09:39,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-18 20:09:39,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:39,168 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:39,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:39,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:39,369 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:39,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:39,369 INFO L85 PathProgramCache]: Analyzing trace with hash 849647476, now seen corresponding path program 17 times [2021-12-18 20:09:39,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:39,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256975541] [2021-12-18 20:09:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:39,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 66 proven. 258 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 20:09:39,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:39,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256975541] [2021-12-18 20:09:39,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256975541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:39,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250213058] [2021-12-18 20:09:39,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:09:39,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:39,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:39,649 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:39,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-12-18 20:09:40,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-18 20:09:40,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:40,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 20:09:40,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:40,117 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:09:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:09:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 91 proven. 233 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 20:09:40,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 120 proven. 204 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 20:09:42,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250213058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:42,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:42,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 57 [2021-12-18 20:09:42,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834115396] [2021-12-18 20:09:42,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-18 20:09:42,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-18 20:09:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-12-18 20:09:42,165 INFO L87 Difference]: Start difference. First operand 2478 states and 2746 transitions. Second operand has 58 states, 57 states have (on average 5.0701754385964914) internal successors, (289), 58 states have internal predecessors, (289), 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) [2021-12-18 20:09:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:44,051 INFO L93 Difference]: Finished difference Result 4009 states and 4411 transitions. [2021-12-18 20:09:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 20:09:44,051 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 5.0701754385964914) internal successors, (289), 58 states have internal predecessors, (289), 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 134 [2021-12-18 20:09:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:44,054 INFO L225 Difference]: With dead ends: 4009 [2021-12-18 20:09:44,054 INFO L226 Difference]: Without dead ends: 4009 [2021-12-18 20:09:44,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1367, Invalid=5439, Unknown=0, NotChecked=0, Total=6806 [2021-12-18 20:09:44,055 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 745 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 2852 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:44,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 1454 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2852 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 20:09:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4009 states. [2021-12-18 20:09:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4009 to 3364. [2021-12-18 20:09:44,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3362 states have (on average 1.1183819155264723) internal successors, (3760), 3363 states have internal predecessors, (3760), 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) [2021-12-18 20:09:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 3760 transitions. [2021-12-18 20:09:44,084 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 3760 transitions. Word has length 134 [2021-12-18 20:09:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:44,085 INFO L470 AbstractCegarLoop]: Abstraction has 3364 states and 3760 transitions. [2021-12-18 20:09:44,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 5.0701754385964914) internal successors, (289), 58 states have internal predecessors, (289), 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) [2021-12-18 20:09:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 3760 transitions. [2021-12-18 20:09:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-18 20:09:44,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:44,087 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:44,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:44,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:44,287 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:44,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:44,288 INFO L85 PathProgramCache]: Analyzing trace with hash -606633852, now seen corresponding path program 15 times [2021-12-18 20:09:44,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:44,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904346568] [2021-12-18 20:09:44,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:44,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 66 proven. 370 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:44,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:44,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904346568] [2021-12-18 20:09:44,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904346568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:44,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643103783] [2021-12-18 20:09:44,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:09:44,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:44,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:44,536 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:44,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-12-18 20:09:44,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 20:09:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-18 20:09:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 91 proven. 345 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:45,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:46,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 11 [2021-12-18 20:09:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 120 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:09:46,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643103783] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:46,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:46,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 53 [2021-12-18 20:09:46,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936944342] [2021-12-18 20:09:46,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:46,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 20:09:46,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 20:09:46,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2472, Unknown=0, NotChecked=0, Total=2862 [2021-12-18 20:09:46,691 INFO L87 Difference]: Start difference. First operand 3364 states and 3760 transitions. Second operand has 54 states, 53 states have (on average 6.849056603773585) internal successors, (363), 54 states have internal predecessors, (363), 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) [2021-12-18 20:09:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:47,967 INFO L93 Difference]: Finished difference Result 4176 states and 4630 transitions. [2021-12-18 20:09:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-18 20:09:47,968 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 6.849056603773585) internal successors, (363), 54 states have internal predecessors, (363), 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 136 [2021-12-18 20:09:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:47,971 INFO L225 Difference]: With dead ends: 4176 [2021-12-18 20:09:47,971 INFO L226 Difference]: Without dead ends: 4176 [2021-12-18 20:09:47,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 236 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1177, Invalid=4373, Unknown=0, NotChecked=0, Total=5550 [2021-12-18 20:09:47,972 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1658 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:47,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 634 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-18 20:09:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-12-18 20:09:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3664. [2021-12-18 20:09:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3662 states have (on average 1.11796832332059) internal successors, (4094), 3663 states have internal predecessors, (4094), 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) [2021-12-18 20:09:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 4094 transitions. [2021-12-18 20:09:47,999 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 4094 transitions. Word has length 136 [2021-12-18 20:09:47,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:47,999 INFO L470 AbstractCegarLoop]: Abstraction has 3664 states and 4094 transitions. [2021-12-18 20:09:47,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 6.849056603773585) internal successors, (363), 54 states have internal predecessors, (363), 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) [2021-12-18 20:09:47,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 4094 transitions. [2021-12-18 20:09:48,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-18 20:09:48,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:48,001 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:48,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-12-18 20:09:48,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:48,201 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:48,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1565650746, now seen corresponding path program 8 times [2021-12-18 20:09:48,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:48,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996408683] [2021-12-18 20:09:48,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:48,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 207 proven. 147 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:09:48,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996408683] [2021-12-18 20:09:48,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996408683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:48,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947186771] [2021-12-18 20:09:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:09:48,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:48,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:48,447 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:48,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-12-18 20:09:48,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:09:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-18 20:09:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:48,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:09:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:09:48,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:09:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 209 proven. 145 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:09:49,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 208 proven. 146 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-18 20:09:49,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947186771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:49,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:49,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 50 [2021-12-18 20:09:49,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140356109] [2021-12-18 20:09:49,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:49,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-18 20:09:49,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-18 20:09:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2021-12-18 20:09:49,970 INFO L87 Difference]: Start difference. First operand 3664 states and 4094 transitions. Second operand has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 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) [2021-12-18 20:09:50,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:09:50,919 INFO L93 Difference]: Finished difference Result 3886 states and 4278 transitions. [2021-12-18 20:09:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-18 20:09:50,920 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 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 137 [2021-12-18 20:09:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:09:50,922 INFO L225 Difference]: With dead ends: 3886 [2021-12-18 20:09:50,922 INFO L226 Difference]: Without dead ends: 2801 [2021-12-18 20:09:50,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=838, Invalid=3718, Unknown=0, NotChecked=0, Total=4556 [2021-12-18 20:09:50,922 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 218 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:09:50,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 726 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-18 20:09:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-12-18 20:09:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2798. [2021-12-18 20:09:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2796 states have (on average 1.1144492131616595) internal successors, (3116), 2797 states have internal predecessors, (3116), 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) [2021-12-18 20:09:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 3116 transitions. [2021-12-18 20:09:50,943 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 3116 transitions. Word has length 137 [2021-12-18 20:09:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:09:50,943 INFO L470 AbstractCegarLoop]: Abstraction has 2798 states and 3116 transitions. [2021-12-18 20:09:50,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.2) internal successors, (260), 50 states have internal predecessors, (260), 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) [2021-12-18 20:09:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 3116 transitions. [2021-12-18 20:09:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 20:09:50,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:09:50,945 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:09:50,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-12-18 20:09:51,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-12-18 20:09:51,147 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:09:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:09:51,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1394099389, now seen corresponding path program 9 times [2021-12-18 20:09:51,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:09:51,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019338846] [2021-12-18 20:09:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:09:51,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:09:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:09:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 9 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:09:52,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:09:52,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019338846] [2021-12-18 20:09:52,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019338846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:09:52,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883657238] [2021-12-18 20:09:52,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:09:52,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:09:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:09:52,532 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:09:52,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-12-18 20:09:53,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-18 20:09:53,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:09:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-18 20:09:53,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:09:53,454 INFO L388 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 14 treesize of output 10 [2021-12-18 20:09:54,484 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:09:54,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:09:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 41 proven. 311 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-18 20:09:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:09:55,187 INFO L388 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 15 treesize of output 13 [2021-12-18 20:09:55,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:09:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 41 proven. 311 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-18 20:09:55,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883657238] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:09:55,481 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:09:55,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 24, 24] total 74 [2021-12-18 20:09:55,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834041367] [2021-12-18 20:09:55,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:09:55,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-12-18 20:09:55,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:09:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-12-18 20:09:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=5201, Unknown=0, NotChecked=0, Total=5402 [2021-12-18 20:09:55,482 INFO L87 Difference]: Start difference. First operand 2798 states and 3116 transitions. Second operand has 74 states, 74 states have (on average 4.283783783783784) internal successors, (317), 74 states have internal predecessors, (317), 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) [2021-12-18 20:10:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:01,301 INFO L93 Difference]: Finished difference Result 5170 states and 5683 transitions. [2021-12-18 20:10:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-18 20:10:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 4.283783783783784) internal successors, (317), 74 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-18 20:10:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:01,305 INFO L225 Difference]: With dead ends: 5170 [2021-12-18 20:10:01,305 INFO L226 Difference]: Without dead ends: 5144 [2021-12-18 20:10:01,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 247 SyntacticMatches, 9 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 2835 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=609, Invalid=14153, Unknown=0, NotChecked=0, Total=14762 [2021-12-18 20:10:01,306 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 726 mSDsluCounter, 7646 mSDsCounter, 0 mSdLazyCounter, 7282 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 7827 SdHoareTripleChecker+Invalid, 9812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 7282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2462 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:01,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [726 Valid, 7827 Invalid, 9812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 7282 Invalid, 0 Unknown, 2462 Unchecked, 2.9s Time] [2021-12-18 20:10:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-12-18 20:10:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 3225. [2021-12-18 20:10:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3223 states have (on average 1.1144896059571827) internal successors, (3592), 3224 states have internal predecessors, (3592), 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) [2021-12-18 20:10:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 3592 transitions. [2021-12-18 20:10:01,332 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 3592 transitions. Word has length 141 [2021-12-18 20:10:01,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:01,333 INFO L470 AbstractCegarLoop]: Abstraction has 3225 states and 3592 transitions. [2021-12-18 20:10:01,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 4.283783783783784) internal successors, (317), 74 states have internal predecessors, (317), 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) [2021-12-18 20:10:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 3592 transitions. [2021-12-18 20:10:01,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-18 20:10:01,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:01,334 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:01,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:01,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:01,535 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:10:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -688260628, now seen corresponding path program 18 times [2021-12-18 20:10:01,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:01,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612498364] [2021-12-18 20:10:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:01,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:02,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612498364] [2021-12-18 20:10:02,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612498364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:02,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958618635] [2021-12-18 20:10:02,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:10:02,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:02,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:02,950 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:02,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-12-18 20:10:03,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-18 20:10:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:03,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-18 20:10:03,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:03,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:10:04,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:10:04,982 INFO L388 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 17 treesize of output 19 [2021-12-18 20:10:06,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:10:06,450 INFO L354 Elim1Store]: treesize reduction 17, result has 43.3 percent of original size [2021-12-18 20:10:06,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-12-18 20:10:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 491 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:06,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:08,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_3861 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3861))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)))) (= 0 .cse0))))) is different from false [2021-12-18 20:10:08,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:08,064 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:10:08,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:08,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:10:08,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:08,088 INFO L388 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 68 treesize of output 64 [2021-12-18 20:10:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-18 20:10:09,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958618635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:09,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:09,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 31] total 101 [2021-12-18 20:10:09,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274158199] [2021-12-18 20:10:09,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:09,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-18 20:10:09,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-18 20:10:09,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=9609, Unknown=1, NotChecked=196, Total=10100 [2021-12-18 20:10:09,362 INFO L87 Difference]: Start difference. First operand 3225 states and 3592 transitions. Second operand has 101 states, 101 states have (on average 3.801980198019802) internal successors, (384), 101 states have internal predecessors, (384), 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) [2021-12-18 20:10:15,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:15,754 INFO L93 Difference]: Finished difference Result 3680 states and 4093 transitions. [2021-12-18 20:10:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-18 20:10:15,754 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.801980198019802) internal successors, (384), 101 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-18 20:10:15,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:15,757 INFO L225 Difference]: With dead ends: 3680 [2021-12-18 20:10:15,757 INFO L226 Difference]: Without dead ends: 3677 [2021-12-18 20:10:15,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=973, Invalid=24470, Unknown=1, NotChecked=316, Total=25760 [2021-12-18 20:10:15,759 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 363 mSDsluCounter, 5540 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 5625 SdHoareTripleChecker+Invalid, 5471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1619 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:15,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 5625 Invalid, 5471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3763 Invalid, 0 Unknown, 1619 Unchecked, 1.4s Time] [2021-12-18 20:10:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-12-18 20:10:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 3340. [2021-12-18 20:10:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3338 states have (on average 1.115937687237867) internal successors, (3725), 3339 states have internal predecessors, (3725), 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) [2021-12-18 20:10:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 3725 transitions. [2021-12-18 20:10:15,781 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 3725 transitions. Word has length 141 [2021-12-18 20:10:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:15,781 INFO L470 AbstractCegarLoop]: Abstraction has 3340 states and 3725 transitions. [2021-12-18 20:10:15,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.801980198019802) internal successors, (384), 101 states have internal predecessors, (384), 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) [2021-12-18 20:10:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 3725 transitions. [2021-12-18 20:10:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-18 20:10:15,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:15,783 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:15,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-12-18 20:10:15,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:15,984 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:10:15,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:15,984 INFO L85 PathProgramCache]: Analyzing trace with hash 784586223, now seen corresponding path program 19 times [2021-12-18 20:10:15,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:15,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477959398] [2021-12-18 20:10:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:15,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 41 proven. 493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:16,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:16,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477959398] [2021-12-18 20:10:16,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477959398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:16,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270511293] [2021-12-18 20:10:16,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:10:16,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:16,724 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:16,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-18 20:10:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 20:10:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:17,313 INFO L388 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 14 treesize of output 10 [2021-12-18 20:10:17,590 INFO L388 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 15 treesize of output 7 [2021-12-18 20:10:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:10:17,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:17,812 INFO L388 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 15 treesize of output 13 [2021-12-18 20:10:17,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:10:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:10:18,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270511293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:18,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:18,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 26, 26] total 55 [2021-12-18 20:10:18,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214788768] [2021-12-18 20:10:18,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:18,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-18 20:10:18,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:18,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-18 20:10:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2804, Unknown=0, NotChecked=0, Total=2970 [2021-12-18 20:10:18,035 INFO L87 Difference]: Start difference. First operand 3340 states and 3725 transitions. Second operand has 55 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 55 states have internal predecessors, (213), 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) [2021-12-18 20:10:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:24,661 INFO L93 Difference]: Finished difference Result 8093 states and 8937 transitions. [2021-12-18 20:10:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-18 20:10:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 55 states have internal predecessors, (213), 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 145 [2021-12-18 20:10:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:24,666 INFO L225 Difference]: With dead ends: 8093 [2021-12-18 20:10:24,666 INFO L226 Difference]: Without dead ends: 8042 [2021-12-18 20:10:24,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 267 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1580, Invalid=15976, Unknown=0, NotChecked=0, Total=17556 [2021-12-18 20:10:24,667 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 3986 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 5866 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3986 SdHoareTripleChecker+Valid, 4803 SdHoareTripleChecker+Invalid, 6184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 5866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:24,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3986 Valid, 4803 Invalid, 6184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 5866 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-18 20:10:24,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8042 states. [2021-12-18 20:10:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8042 to 3883. [2021-12-18 20:10:24,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3881 states have (on average 1.1164648286524093) internal successors, (4333), 3882 states have internal predecessors, (4333), 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) [2021-12-18 20:10:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 4333 transitions. [2021-12-18 20:10:24,697 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 4333 transitions. Word has length 145 [2021-12-18 20:10:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:24,697 INFO L470 AbstractCegarLoop]: Abstraction has 3883 states and 4333 transitions. [2021-12-18 20:10:24,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.8727272727272726) internal successors, (213), 55 states have internal predecessors, (213), 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) [2021-12-18 20:10:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 4333 transitions. [2021-12-18 20:10:24,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-18 20:10:24,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:24,698 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:24,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:24,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-12-18 20:10:24,899 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:10:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash 27679750, now seen corresponding path program 16 times [2021-12-18 20:10:24,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:24,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177660561] [2021-12-18 20:10:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:24,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 81 proven. 444 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:25,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:25,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177660561] [2021-12-18 20:10:25,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177660561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:25,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929578618] [2021-12-18 20:10:25,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:10:25,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:25,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:25,503 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:25,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-12-18 20:10:25,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:10:25,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-18 20:10:25,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:25,755 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:10:25,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:10:26,576 INFO L388 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 13 treesize of output 9 [2021-12-18 20:10:26,642 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:10:26,642 INFO L388 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 16 treesize of output 22 [2021-12-18 20:10:26,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 3 [2021-12-18 20:10:34,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:10:34,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2021-12-18 20:10:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 397 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:35,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:36,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:36,355 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-18 20:10:36,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:10:36,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-18 20:10:36,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-12-18 20:10:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 526 backedges. 342 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:10:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929578618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:38,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:38,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 82 [2021-12-18 20:10:38,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179246595] [2021-12-18 20:10:38,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:38,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-18 20:10:38,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-18 20:10:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=6140, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 20:10:38,106 INFO L87 Difference]: Start difference. First operand 3883 states and 4333 transitions. Second operand has 82 states, 82 states have (on average 5.097560975609756) internal successors, (418), 82 states have internal predecessors, (418), 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) [2021-12-18 20:10:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:41,599 INFO L93 Difference]: Finished difference Result 4711 states and 5215 transitions. [2021-12-18 20:10:41,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-12-18 20:10:41,599 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 5.097560975609756) internal successors, (418), 82 states have internal predecessors, (418), 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 147 [2021-12-18 20:10:41,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:41,602 INFO L225 Difference]: With dead ends: 4711 [2021-12-18 20:10:41,602 INFO L226 Difference]: Without dead ends: 4586 [2021-12-18 20:10:41,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 264 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1241, Invalid=16849, Unknown=0, NotChecked=0, Total=18090 [2021-12-18 20:10:41,604 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 212 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:41,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 1200 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1085 Invalid, 0 Unknown, 148 Unchecked, 0.4s Time] [2021-12-18 20:10:41,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-12-18 20:10:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 4583. [2021-12-18 20:10:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4581 states have (on average 1.110456232263698) internal successors, (5087), 4582 states have internal predecessors, (5087), 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) [2021-12-18 20:10:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 5087 transitions. [2021-12-18 20:10:41,627 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 5087 transitions. Word has length 147 [2021-12-18 20:10:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:41,627 INFO L470 AbstractCegarLoop]: Abstraction has 4583 states and 5087 transitions. [2021-12-18 20:10:41,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 5.097560975609756) internal successors, (418), 82 states have internal predecessors, (418), 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) [2021-12-18 20:10:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 5087 transitions. [2021-12-18 20:10:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-18 20:10:41,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:41,629 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:41,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:41,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-12-18 20:10:41,830 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:10:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:41,830 INFO L85 PathProgramCache]: Analyzing trace with hash 145439666, now seen corresponding path program 20 times [2021-12-18 20:10:41,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:41,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48247590] [2021-12-18 20:10:41,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:41,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:10:42,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48247590] [2021-12-18 20:10:42,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48247590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407483923] [2021-12-18 20:10:42,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:10:42,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:42,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:42,120 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:42,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-12-18 20:10:42,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:10:42,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-18 20:10:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:10:42,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:43,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-18 20:10:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:10:43,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407483923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:43,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:43,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 50 [2021-12-18 20:10:43,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701754716] [2021-12-18 20:10:43,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:43,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 20:10:43,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:43,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 20:10:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2021-12-18 20:10:43,611 INFO L87 Difference]: Start difference. First operand 4583 states and 5087 transitions. Second operand has 51 states, 50 states have (on average 4.82) internal successors, (241), 51 states have internal predecessors, (241), 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) [2021-12-18 20:10:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:46,088 INFO L93 Difference]: Finished difference Result 5069 states and 5582 transitions. [2021-12-18 20:10:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-18 20:10:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.82) internal successors, (241), 51 states have internal predecessors, (241), 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 149 [2021-12-18 20:10:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:46,092 INFO L225 Difference]: With dead ends: 5069 [2021-12-18 20:10:46,092 INFO L226 Difference]: Without dead ends: 5069 [2021-12-18 20:10:46,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 268 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1194, Invalid=5126, Unknown=0, NotChecked=0, Total=6320 [2021-12-18 20:10:46,093 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1074 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 4170 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:46,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1074 Valid, 2012 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4170 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-18 20:10:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-12-18 20:10:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4646. [2021-12-18 20:10:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4644 states have (on average 1.1108957795004306) internal successors, (5159), 4645 states have internal predecessors, (5159), 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) [2021-12-18 20:10:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 5159 transitions. [2021-12-18 20:10:46,117 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 5159 transitions. Word has length 149 [2021-12-18 20:10:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:46,117 INFO L470 AbstractCegarLoop]: Abstraction has 4646 states and 5159 transitions. [2021-12-18 20:10:46,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.82) internal successors, (241), 51 states have internal predecessors, (241), 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) [2021-12-18 20:10:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 5159 transitions. [2021-12-18 20:10:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-18 20:10:46,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:46,119 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:46,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:46,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:46,327 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:10:46,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash 407759305, now seen corresponding path program 17 times [2021-12-18 20:10:46,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396974434] [2021-12-18 20:10:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:46,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 91 proven. 467 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:46,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:46,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396974434] [2021-12-18 20:10:46,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396974434] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:46,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445723553] [2021-12-18 20:10:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:10:46,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:46,605 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:46,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-12-18 20:10:46,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-18 20:10:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:46,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-18 20:10:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:46,980 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:10:46,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:10:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:10:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 120 proven. 438 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:48,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 153 proven. 405 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:10:49,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445723553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:49,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:49,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 63 [2021-12-18 20:10:49,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042239115] [2021-12-18 20:10:49,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:49,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-18 20:10:49,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-18 20:10:49,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3565, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 20:10:49,296 INFO L87 Difference]: Start difference. First operand 4646 states and 5159 transitions. Second operand has 64 states, 63 states have (on average 7.063492063492063) internal successors, (445), 64 states have internal predecessors, (445), 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) [2021-12-18 20:10:50,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:10:50,477 INFO L93 Difference]: Finished difference Result 8983 states and 9994 transitions. [2021-12-18 20:10:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-18 20:10:50,478 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 7.063492063492063) internal successors, (445), 64 states have internal predecessors, (445), 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 151 [2021-12-18 20:10:50,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:10:50,484 INFO L225 Difference]: With dead ends: 8983 [2021-12-18 20:10:50,484 INFO L226 Difference]: Without dead ends: 8983 [2021-12-18 20:10:50,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=994, Invalid=5012, Unknown=0, NotChecked=0, Total=6006 [2021-12-18 20:10:50,484 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 693 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 2322 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:10:50,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 1361 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2322 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:10:50,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8983 states. [2021-12-18 20:10:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8983 to 5066. [2021-12-18 20:10:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5064 states have (on average 1.111176935229068) internal successors, (5627), 5065 states have internal predecessors, (5627), 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) [2021-12-18 20:10:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 5627 transitions. [2021-12-18 20:10:50,519 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 5627 transitions. Word has length 151 [2021-12-18 20:10:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:10:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 5066 states and 5627 transitions. [2021-12-18 20:10:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 7.063492063492063) internal successors, (445), 64 states have internal predecessors, (445), 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) [2021-12-18 20:10:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 5627 transitions. [2021-12-18 20:10:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-18 20:10:50,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:10:50,522 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:10:50,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-12-18 20:10:50,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:50,722 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:10:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:10:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1200311549, now seen corresponding path program 10 times [2021-12-18 20:10:50,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:10:50,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939618963] [2021-12-18 20:10:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:10:50,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:10:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:10:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 11 proven. 577 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-18 20:10:52,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:10:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939618963] [2021-12-18 20:10:52,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939618963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:10:52,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527707804] [2021-12-18 20:10:52,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:10:52,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:10:52,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:10:52,120 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:10:52,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-12-18 20:10:52,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:10:52,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:10:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-18 20:10:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:10:52,372 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:10:52,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:10:53,023 INFO L388 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 13 treesize of output 9 [2021-12-18 20:10:54,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:10:54,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:10:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 205 proven. 261 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-18 20:10:54,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:10:55,321 INFO L388 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 13 treesize of output 11 [2021-12-18 20:10:55,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:10:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 192 proven. 274 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-18 20:10:56,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527707804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:10:56,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:10:56,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 25, 25] total 84 [2021-12-18 20:10:56,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11782125] [2021-12-18 20:10:56,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:10:56,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-12-18 20:10:56,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:10:56,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-12-18 20:10:56,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=6556, Unknown=0, NotChecked=0, Total=6972 [2021-12-18 20:10:56,578 INFO L87 Difference]: Start difference. First operand 5066 states and 5627 transitions. Second operand has 84 states, 84 states have (on average 4.190476190476191) internal successors, (352), 84 states have internal predecessors, (352), 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) [2021-12-18 20:11:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:02,659 INFO L93 Difference]: Finished difference Result 5406 states and 5957 transitions. [2021-12-18 20:11:02,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-18 20:11:02,659 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.190476190476191) internal successors, (352), 84 states have internal predecessors, (352), 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 155 [2021-12-18 20:11:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:02,663 INFO L225 Difference]: With dead ends: 5406 [2021-12-18 20:11:02,663 INFO L226 Difference]: Without dead ends: 5376 [2021-12-18 20:11:02,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 305 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6006 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2164, Invalid=25226, Unknown=0, NotChecked=0, Total=27390 [2021-12-18 20:11:02,665 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 479 mSDsluCounter, 4581 mSDsCounter, 0 mSdLazyCounter, 2871 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 4684 SdHoareTripleChecker+Invalid, 3637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:02,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 4684 Invalid, 3637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2871 Invalid, 0 Unknown, 654 Unchecked, 1.2s Time] [2021-12-18 20:11:02,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-12-18 20:11:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4514. [2021-12-18 20:11:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4512 states have (on average 1.106604609929078) internal successors, (4993), 4513 states have internal predecessors, (4993), 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) [2021-12-18 20:11:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 4993 transitions. [2021-12-18 20:11:02,708 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 4993 transitions. Word has length 155 [2021-12-18 20:11:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:02,708 INFO L470 AbstractCegarLoop]: Abstraction has 4514 states and 4993 transitions. [2021-12-18 20:11:02,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.190476190476191) internal successors, (352), 84 states have internal predecessors, (352), 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) [2021-12-18 20:11:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 4993 transitions. [2021-12-18 20:11:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-18 20:11:02,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:02,711 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:02,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:02,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-12-18 20:11:02,913 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:11:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:02,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1216629778, now seen corresponding path program 21 times [2021-12-18 20:11:02,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:02,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327048842] [2021-12-18 20:11:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:02,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 46 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:11:04,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:04,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327048842] [2021-12-18 20:11:04,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327048842] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:04,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261123139] [2021-12-18 20:11:04,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:11:04,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:04,392 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:04,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-12-18 20:11:05,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-18 20:11:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-18 20:11:05,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:05,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:11:06,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:11:06,155 INFO L388 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 17 treesize of output 19 [2021-12-18 20:11:07,762 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-18 20:11:07,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-18 20:11:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 10 proven. 468 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:11:07,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:09,539 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_4337 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4337))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) .cse1)) (= 0 .cse1))))) is different from false [2021-12-18 20:11:09,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:09,545 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:11:09,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:09,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:11:09,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:09,566 INFO L388 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 68 treesize of output 64 [2021-12-18 20:11:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 10 proven. 468 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:11:10,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261123139] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:10,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:10,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 33, 33] total 91 [2021-12-18 20:11:10,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017980992] [2021-12-18 20:11:10,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:10,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-18 20:11:10,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:10,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-18 20:11:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=7765, Unknown=1, NotChecked=176, Total=8190 [2021-12-18 20:11:10,344 INFO L87 Difference]: Start difference. First operand 4514 states and 4993 transitions. Second operand has 91 states, 91 states have (on average 3.89010989010989) internal successors, (354), 91 states have internal predecessors, (354), 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) [2021-12-18 20:11:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:18,258 INFO L93 Difference]: Finished difference Result 8091 states and 8965 transitions. [2021-12-18 20:11:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-12-18 20:11:18,258 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.89010989010989) internal successors, (354), 91 states have internal predecessors, (354), 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 156 [2021-12-18 20:11:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:18,265 INFO L225 Difference]: With dead ends: 8091 [2021-12-18 20:11:18,265 INFO L226 Difference]: Without dead ends: 8088 [2021-12-18 20:11:18,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 260 SyntacticMatches, 14 SemanticMatches, 154 ConstructedPredicates, 1 IntricatePredicates, 12 DeprecatedPredicates, 4633 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1079, Invalid=22794, Unknown=1, NotChecked=306, Total=24180 [2021-12-18 20:11:18,267 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 340 mSDsluCounter, 6641 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 6763 SdHoareTripleChecker+Invalid, 7535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3354 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:18,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 6763 Invalid, 7535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 4089 Invalid, 0 Unknown, 3354 Unchecked, 1.7s Time] [2021-12-18 20:11:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8088 states. [2021-12-18 20:11:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8088 to 4640. [2021-12-18 20:11:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4638 states have (on average 1.108020698576973) internal successors, (5139), 4639 states have internal predecessors, (5139), 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) [2021-12-18 20:11:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 5139 transitions. [2021-12-18 20:11:18,307 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 5139 transitions. Word has length 156 [2021-12-18 20:11:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:18,307 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 5139 transitions. [2021-12-18 20:11:18,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.89010989010989) internal successors, (354), 91 states have internal predecessors, (354), 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) [2021-12-18 20:11:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 5139 transitions. [2021-12-18 20:11:18,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-18 20:11:18,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:18,310 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:18,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:18,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-12-18 20:11:18,510 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:11:18,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:18,511 INFO L85 PathProgramCache]: Analyzing trace with hash 112867661, now seen corresponding path program 4 times [2021-12-18 20:11:18,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:18,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260841796] [2021-12-18 20:11:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:18,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 88 proven. 493 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:11:19,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260841796] [2021-12-18 20:11:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260841796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:19,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242646750] [2021-12-18 20:11:19,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:11:19,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:19,292 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:19,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-12-18 20:11:19,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:11:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-18 20:11:19,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:19,570 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:11:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:11:20,507 INFO L388 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 14 treesize of output 10 [2021-12-18 20:11:20,583 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:11:20,583 INFO L388 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 17 treesize of output 23 [2021-12-18 20:11:20,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 3 [2021-12-18 20:11:27,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:27,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-18 20:11:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 390 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:11:28,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:29,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:29,174 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:11:29,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:29,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:11:29,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:11:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 43 proven. 544 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 20:11:30,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242646750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:30,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:30,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 30] total 87 [2021-12-18 20:11:30,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584343197] [2021-12-18 20:11:30,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:30,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-18 20:11:30,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-18 20:11:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=6935, Unknown=1, NotChecked=0, Total=7482 [2021-12-18 20:11:30,953 INFO L87 Difference]: Start difference. First operand 4640 states and 5139 transitions. Second operand has 87 states, 87 states have (on average 5.057471264367816) internal successors, (440), 87 states have internal predecessors, (440), 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) [2021-12-18 20:11:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:34,275 INFO L93 Difference]: Finished difference Result 4933 states and 5454 transitions. [2021-12-18 20:11:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-18 20:11:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 5.057471264367816) internal successors, (440), 87 states have internal predecessors, (440), 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 158 [2021-12-18 20:11:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:34,279 INFO L225 Difference]: With dead ends: 4933 [2021-12-18 20:11:34,279 INFO L226 Difference]: Without dead ends: 4628 [2021-12-18 20:11:34,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 267 SyntacticMatches, 10 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3868 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1318, Invalid=17041, Unknown=1, NotChecked=0, Total=18360 [2021-12-18 20:11:34,280 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 254 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:34,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1483 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 953 Invalid, 0 Unknown, 333 Unchecked, 0.4s Time] [2021-12-18 20:11:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2021-12-18 20:11:34,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 4627. [2021-12-18 20:11:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4625 states have (on average 1.107027027027027) internal successors, (5120), 4626 states have internal predecessors, (5120), 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) [2021-12-18 20:11:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 5120 transitions. [2021-12-18 20:11:34,303 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 5120 transitions. Word has length 158 [2021-12-18 20:11:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:34,303 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 5120 transitions. [2021-12-18 20:11:34,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 5.057471264367816) internal successors, (440), 87 states have internal predecessors, (440), 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) [2021-12-18 20:11:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 5120 transitions. [2021-12-18 20:11:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-18 20:11:34,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:34,306 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:34,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:34,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-12-18 20:11:34,519 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:11:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:34,519 INFO L85 PathProgramCache]: Analyzing trace with hash 464550901, now seen corresponding path program 5 times [2021-12-18 20:11:34,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:34,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87599680] [2021-12-18 20:11:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:34,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 88 proven. 493 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:11:34,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87599680] [2021-12-18 20:11:34,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87599680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:34,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419189021] [2021-12-18 20:11:34,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:11:34,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:34,867 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:34,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-12-18 20:11:35,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 20:11:35,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:35,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-18 20:11:35,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:35,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:11:35,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:11:35,617 INFO L388 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 17 treesize of output 19 [2021-12-18 20:11:35,940 INFO L388 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 15 treesize of output 7 [2021-12-18 20:11:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 88 proven. 493 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:11:35,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:36,179 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4463 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4463) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 8)) 0)) is different from false [2021-12-18 20:11:36,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:36,185 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:11:36,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:36,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:11:36,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:11:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 88 proven. 493 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:11:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419189021] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:36,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:36,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 43 [2021-12-18 20:11:36,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833366545] [2021-12-18 20:11:36,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:36,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-18 20:11:36,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:36,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-18 20:11:36,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1611, Unknown=1, NotChecked=80, Total=1806 [2021-12-18 20:11:36,479 INFO L87 Difference]: Start difference. First operand 4627 states and 5120 transitions. Second operand has 43 states, 43 states have (on average 5.186046511627907) internal successors, (223), 43 states have internal predecessors, (223), 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) [2021-12-18 20:11:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:37,613 INFO L93 Difference]: Finished difference Result 7298 states and 8070 transitions. [2021-12-18 20:11:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-18 20:11:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.186046511627907) internal successors, (223), 43 states have internal predecessors, (223), 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 158 [2021-12-18 20:11:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:37,616 INFO L225 Difference]: With dead ends: 7298 [2021-12-18 20:11:37,616 INFO L226 Difference]: Without dead ends: 4613 [2021-12-18 20:11:37,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 294 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=198, Invalid=2775, Unknown=1, NotChecked=106, Total=3080 [2021-12-18 20:11:37,617 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 79 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:37,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1880 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2261 Invalid, 0 Unknown, 234 Unchecked, 0.7s Time] [2021-12-18 20:11:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-12-18 20:11:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4465. [2021-12-18 20:11:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4465 states, 4463 states have (on average 1.113376652475913) internal successors, (4969), 4464 states have internal predecessors, (4969), 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) [2021-12-18 20:11:37,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4465 states to 4465 states and 4969 transitions. [2021-12-18 20:11:37,642 INFO L78 Accepts]: Start accepts. Automaton has 4465 states and 4969 transitions. Word has length 158 [2021-12-18 20:11:37,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:37,642 INFO L470 AbstractCegarLoop]: Abstraction has 4465 states and 4969 transitions. [2021-12-18 20:11:37,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.186046511627907) internal successors, (223), 43 states have internal predecessors, (223), 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) [2021-12-18 20:11:37,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4465 states and 4969 transitions. [2021-12-18 20:11:37,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-18 20:11:37,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:37,656 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:37,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:37,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-12-18 20:11:37,856 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:11:37,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1275858549, now seen corresponding path program 22 times [2021-12-18 20:11:37,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:37,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968439511] [2021-12-18 20:11:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:37,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 46 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:11:38,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:38,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968439511] [2021-12-18 20:11:38,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968439511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:38,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098802745] [2021-12-18 20:11:38,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:11:38,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:38,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:38,728 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:38,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-12-18 20:11:38,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:11:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-18 20:11:38,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:39,006 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:11:39,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:11:39,734 INFO L388 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 13 treesize of output 9 [2021-12-18 20:11:40,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:11:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:11:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 307 proven. 171 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:11:40,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:41,879 INFO L388 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 13 treesize of output 11 [2021-12-18 20:11:41,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:11:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 290 proven. 188 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:11:43,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098802745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:43,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:43,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 29, 29] total 89 [2021-12-18 20:11:43,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041190087] [2021-12-18 20:11:43,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:43,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-18 20:11:43,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-18 20:11:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=7272, Unknown=0, NotChecked=0, Total=7832 [2021-12-18 20:11:43,376 INFO L87 Difference]: Start difference. First operand 4465 states and 4969 transitions. Second operand has 89 states, 89 states have (on average 4.337078651685394) internal successors, (386), 89 states have internal predecessors, (386), 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) [2021-12-18 20:11:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:11:56,929 INFO L93 Difference]: Finished difference Result 4757 states and 5287 transitions. [2021-12-18 20:11:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-12-18 20:11:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 4.337078651685394) internal successors, (386), 89 states have internal predecessors, (386), 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 160 [2021-12-18 20:11:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:11:56,932 INFO L225 Difference]: With dead ends: 4757 [2021-12-18 20:11:56,932 INFO L226 Difference]: Without dead ends: 4754 [2021-12-18 20:11:56,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 285 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12890 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=4269, Invalid=42603, Unknown=0, NotChecked=0, Total=46872 [2021-12-18 20:11:56,934 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 1468 mSDsluCounter, 2957 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 3059 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 753 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:11:56,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 3059 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 3929 Invalid, 0 Unknown, 753 Unchecked, 1.6s Time] [2021-12-18 20:11:56,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2021-12-18 20:11:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 4469. [2021-12-18 20:11:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4467 states have (on average 1.1134989926124916) internal successors, (4974), 4468 states have internal predecessors, (4974), 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) [2021-12-18 20:11:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 4974 transitions. [2021-12-18 20:11:56,958 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 4974 transitions. Word has length 160 [2021-12-18 20:11:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:11:56,958 INFO L470 AbstractCegarLoop]: Abstraction has 4469 states and 4974 transitions. [2021-12-18 20:11:56,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 4.337078651685394) internal successors, (386), 89 states have internal predecessors, (386), 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) [2021-12-18 20:11:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 4974 transitions. [2021-12-18 20:11:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-18 20:11:56,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:11:56,960 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:11:56,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-12-18 20:11:57,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:57,160 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:11:57,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:11:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1864754593, now seen corresponding path program 18 times [2021-12-18 20:11:57,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:11:57,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632444740] [2021-12-18 20:11:57,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:11:57,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:11:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:11:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 91 proven. 567 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:11:57,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:11:57,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632444740] [2021-12-18 20:11:57,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632444740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:11:57,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701868311] [2021-12-18 20:11:57,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:11:57,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:11:57,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:11:57,830 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:11:57,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-12-18 20:11:58,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 20:11:58,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:11:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-18 20:11:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:11:58,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:11:58,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:11:58,817 INFO L388 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 17 treesize of output 19 [2021-12-18 20:11:59,187 INFO L388 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 15 treesize of output 7 [2021-12-18 20:11:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 91 proven. 567 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:11:59,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:11:59,475 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4624 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4624) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-18 20:11:59,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:59,479 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:11:59,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:11:59,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:11:59,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:11:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 91 proven. 567 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:11:59,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701868311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:11:59,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:11:59,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 51 [2021-12-18 20:11:59,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318901076] [2021-12-18 20:11:59,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:11:59,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-18 20:11:59,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:11:59,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-18 20:11:59,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2335, Unknown=1, NotChecked=96, Total=2550 [2021-12-18 20:11:59,835 INFO L87 Difference]: Start difference. First operand 4469 states and 4974 transitions. Second operand has 51 states, 51 states have (on average 4.7254901960784315) internal successors, (241), 51 states have internal predecessors, (241), 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) [2021-12-18 20:12:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:02,289 INFO L93 Difference]: Finished difference Result 7749 states and 8584 transitions. [2021-12-18 20:12:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-18 20:12:02,289 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.7254901960784315) internal successors, (241), 51 states have internal predecessors, (241), 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 162 [2021-12-18 20:12:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:02,304 INFO L225 Difference]: With dead ends: 7749 [2021-12-18 20:12:02,304 INFO L226 Difference]: Without dead ends: 5149 [2021-12-18 20:12:02,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 301 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=283, Invalid=5122, Unknown=1, NotChecked=144, Total=5550 [2021-12-18 20:12:02,305 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 255 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 4305 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 3695 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 4305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 491 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:02,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 3695 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 4305 Invalid, 0 Unknown, 491 Unchecked, 1.5s Time] [2021-12-18 20:12:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5149 states. [2021-12-18 20:12:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5149 to 4612. [2021-12-18 20:12:02,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4610 states have (on average 1.1123644251626899) internal successors, (5128), 4611 states have internal predecessors, (5128), 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) [2021-12-18 20:12:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 5128 transitions. [2021-12-18 20:12:02,337 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 5128 transitions. Word has length 162 [2021-12-18 20:12:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:02,337 INFO L470 AbstractCegarLoop]: Abstraction has 4612 states and 5128 transitions. [2021-12-18 20:12:02,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.7254901960784315) internal successors, (241), 51 states have internal predecessors, (241), 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) [2021-12-18 20:12:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 5128 transitions. [2021-12-18 20:12:02,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-18 20:12:02,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:02,340 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:02,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:02,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:02,559 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:12:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash 589315203, now seen corresponding path program 11 times [2021-12-18 20:12:02,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:02,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487543710] [2021-12-18 20:12:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:02,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 328 proven. 190 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:12:02,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487543710] [2021-12-18 20:12:02,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487543710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:02,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643954896] [2021-12-18 20:12:02,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:12:02,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:02,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:02,827 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:02,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-18 20:12:03,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 20:12:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 20:12:03,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:03,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:12:03,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:12:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:12:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 330 proven. 188 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:12:04,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 330 proven. 188 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-18 20:12:04,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643954896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:04,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:04,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 59 [2021-12-18 20:12:04,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908068696] [2021-12-18 20:12:04,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:04,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-18 20:12:04,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:04,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-18 20:12:04,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 20:12:04,970 INFO L87 Difference]: Start difference. First operand 4612 states and 5128 transitions. Second operand has 59 states, 59 states have (on average 5.406779661016949) internal successors, (319), 59 states have internal predecessors, (319), 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) [2021-12-18 20:12:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:07,726 INFO L93 Difference]: Finished difference Result 5394 states and 5922 transitions. [2021-12-18 20:12:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-18 20:12:07,726 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.406779661016949) internal successors, (319), 59 states have internal predecessors, (319), 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 163 [2021-12-18 20:12:07,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:07,729 INFO L225 Difference]: With dead ends: 5394 [2021-12-18 20:12:07,729 INFO L226 Difference]: Without dead ends: 3784 [2021-12-18 20:12:07,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2635, Invalid=11171, Unknown=0, NotChecked=0, Total=13806 [2021-12-18 20:12:07,730 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 380 mSDsluCounter, 1609 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:07,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 1708 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 20:12:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3784 states. [2021-12-18 20:12:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3784 to 3784. [2021-12-18 20:12:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3782 states have (on average 1.110523532522475) internal successors, (4200), 3783 states have internal predecessors, (4200), 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) [2021-12-18 20:12:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 4200 transitions. [2021-12-18 20:12:07,755 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 4200 transitions. Word has length 163 [2021-12-18 20:12:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:07,755 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 4200 transitions. [2021-12-18 20:12:07,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.406779661016949) internal successors, (319), 59 states have internal predecessors, (319), 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) [2021-12-18 20:12:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 4200 transitions. [2021-12-18 20:12:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-18 20:12:07,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:07,757 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:07,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-12-18 20:12:07,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-12-18 20:12:07,958 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:12:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash -830845592, now seen corresponding path program 23 times [2021-12-18 20:12:07,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:07,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366031478] [2021-12-18 20:12:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:07,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 120 proven. 395 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:12:08,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366031478] [2021-12-18 20:12:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366031478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:08,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78299353] [2021-12-18 20:12:08,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:12:08,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:08,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:08,346 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:08,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-12-18 20:12:08,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-18 20:12:08,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:08,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-18 20:12:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:08,879 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:12:08,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:12:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:12:09,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 190 proven. 325 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:12:11,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78299353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:11,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:11,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 69 [2021-12-18 20:12:11,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139930099] [2021-12-18 20:12:11,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:11,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 20:12:11,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 20:12:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=4233, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 20:12:11,387 INFO L87 Difference]: Start difference. First operand 3784 states and 4200 transitions. Second operand has 70 states, 69 states have (on average 5.144927536231884) internal successors, (355), 70 states have internal predecessors, (355), 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) [2021-12-18 20:12:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:14,421 INFO L93 Difference]: Finished difference Result 5042 states and 5568 transitions. [2021-12-18 20:12:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-18 20:12:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 5.144927536231884) internal successors, (355), 70 states have internal predecessors, (355), 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 164 [2021-12-18 20:12:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:14,426 INFO L225 Difference]: With dead ends: 5042 [2021-12-18 20:12:14,426 INFO L226 Difference]: Without dead ends: 5042 [2021-12-18 20:12:14,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 281 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1999, Invalid=8101, Unknown=0, NotChecked=0, Total=10100 [2021-12-18 20:12:14,427 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 816 mSDsluCounter, 2688 mSDsCounter, 0 mSdLazyCounter, 5901 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 5971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:14,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 2826 Invalid, 5971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5901 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-18 20:12:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5042 states. [2021-12-18 20:12:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 4532. [2021-12-18 20:12:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4532 states, 4530 states have (on average 1.1165562913907285) internal successors, (5058), 4531 states have internal predecessors, (5058), 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) [2021-12-18 20:12:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 5058 transitions. [2021-12-18 20:12:14,460 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 5058 transitions. Word has length 164 [2021-12-18 20:12:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:14,460 INFO L470 AbstractCegarLoop]: Abstraction has 4532 states and 5058 transitions. [2021-12-18 20:12:14,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 5.144927536231884) internal successors, (355), 70 states have internal predecessors, (355), 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) [2021-12-18 20:12:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 5058 transitions. [2021-12-18 20:12:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-18 20:12:14,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:14,462 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:14,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:14,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:14,663 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:12:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2129574270, now seen corresponding path program 19 times [2021-12-18 20:12:14,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:14,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644622444] [2021-12-18 20:12:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:14,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 120 proven. 575 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:12:15,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644622444] [2021-12-18 20:12:15,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644622444] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256311967] [2021-12-18 20:12:15,011 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:12:15,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:15,012 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:15,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-12-18 20:12:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:15,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-18 20:12:15,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:12:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:12:15,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:12:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 153 proven. 542 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:12:16,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 190 proven. 505 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:12:17,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256311967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:17,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:17,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2021-12-18 20:12:17,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123662434] [2021-12-18 20:12:17,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:17,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-18 20:12:17,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-18 20:12:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=4344, Unknown=0, NotChecked=0, Total=4830 [2021-12-18 20:12:17,770 INFO L87 Difference]: Start difference. First operand 4532 states and 5058 transitions. Second operand has 70 states, 69 states have (on average 6.971014492753623) internal successors, (481), 70 states have internal predecessors, (481), 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) [2021-12-18 20:12:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:19,237 INFO L93 Difference]: Finished difference Result 5415 states and 6032 transitions. [2021-12-18 20:12:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-18 20:12:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 6.971014492753623) internal successors, (481), 70 states have internal predecessors, (481), 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 166 [2021-12-18 20:12:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:19,242 INFO L225 Difference]: With dead ends: 5415 [2021-12-18 20:12:19,242 INFO L226 Difference]: Without dead ends: 5415 [2021-12-18 20:12:19,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1383, Invalid=7173, Unknown=0, NotChecked=0, Total=8556 [2021-12-18 20:12:19,243 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1914 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:19,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 1372 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:12:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5415 states. [2021-12-18 20:12:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5415 to 4973. [2021-12-18 20:12:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4971 states have (on average 1.1164755582377792) internal successors, (5550), 4972 states have internal predecessors, (5550), 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) [2021-12-18 20:12:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 5550 transitions. [2021-12-18 20:12:19,275 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 5550 transitions. Word has length 166 [2021-12-18 20:12:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:19,275 INFO L470 AbstractCegarLoop]: Abstraction has 4973 states and 5550 transitions. [2021-12-18 20:12:19,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 6.971014492753623) internal successors, (481), 70 states have internal predecessors, (481), 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) [2021-12-18 20:12:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 5550 transitions. [2021-12-18 20:12:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-18 20:12:19,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:19,277 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:19,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:19,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:19,478 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:12:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash 559149705, now seen corresponding path program 12 times [2021-12-18 20:12:19,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:19,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046448705] [2021-12-18 20:12:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:19,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 11 proven. 730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:21,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046448705] [2021-12-18 20:12:21,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046448705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:21,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512208159] [2021-12-18 20:12:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:12:21,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:21,011 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:21,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-12-18 20:12:22,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-18 20:12:22,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:22,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-18 20:12:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:23,051 INFO L388 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 14 treesize of output 10 [2021-12-18 20:12:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 51 proven. 643 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-18 20:12:24,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:25,343 INFO L388 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 15 treesize of output 13 [2021-12-18 20:12:25,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:12:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 51 proven. 498 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-18 20:12:26,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512208159] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:26,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:26,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 34, 28] total 104 [2021-12-18 20:12:26,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215565934] [2021-12-18 20:12:26,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:26,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-12-18 20:12:26,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:26,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-12-18 20:12:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=10404, Unknown=0, NotChecked=0, Total=10712 [2021-12-18 20:12:26,178 INFO L87 Difference]: Start difference. First operand 4973 states and 5550 transitions. Second operand has 104 states, 104 states have (on average 4.278846153846154) internal successors, (445), 104 states have internal predecessors, (445), 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) [2021-12-18 20:12:33,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:33,494 INFO L93 Difference]: Finished difference Result 10246 states and 11354 transitions. [2021-12-18 20:12:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-18 20:12:33,495 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.278846153846154) internal successors, (445), 104 states have internal predecessors, (445), 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 171 [2021-12-18 20:12:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:33,502 INFO L225 Difference]: With dead ends: 10246 [2021-12-18 20:12:33,503 INFO L226 Difference]: Without dead ends: 10213 [2021-12-18 20:12:33,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5195 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=939, Invalid=27453, Unknown=0, NotChecked=0, Total=28392 [2021-12-18 20:12:33,504 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 1327 mSDsluCounter, 14174 mSDsCounter, 0 mSdLazyCounter, 8541 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 14415 SdHoareTripleChecker+Invalid, 17201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 8541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8566 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:33,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 14415 Invalid, 17201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 8541 Invalid, 0 Unknown, 8566 Unchecked, 3.1s Time] [2021-12-18 20:12:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10213 states. [2021-12-18 20:12:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10213 to 5646. [2021-12-18 20:12:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5646 states, 5644 states have (on average 1.116938341601701) internal successors, (6304), 5645 states have internal predecessors, (6304), 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) [2021-12-18 20:12:33,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5646 states to 5646 states and 6304 transitions. [2021-12-18 20:12:33,554 INFO L78 Accepts]: Start accepts. Automaton has 5646 states and 6304 transitions. Word has length 171 [2021-12-18 20:12:33,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:33,554 INFO L470 AbstractCegarLoop]: Abstraction has 5646 states and 6304 transitions. [2021-12-18 20:12:33,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.278846153846154) internal successors, (445), 104 states have internal predecessors, (445), 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) [2021-12-18 20:12:33,554 INFO L276 IsEmpty]: Start isEmpty. Operand 5646 states and 6304 transitions. [2021-12-18 20:12:33,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-18 20:12:33,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:33,557 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:33,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:33,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-12-18 20:12:33,757 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:12:33,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:33,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1759340920, now seen corresponding path program 24 times [2021-12-18 20:12:33,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:33,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390977802] [2021-12-18 20:12:33,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:33,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 51 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:35,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:35,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390977802] [2021-12-18 20:12:35,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390977802] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:35,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701087070] [2021-12-18 20:12:35,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:12:35,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:35,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:35,465 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:35,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-12-18 20:12:36,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-18 20:12:36,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:12:36,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-18 20:12:36,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:36,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:12:37,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:12:37,762 INFO L388 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 17 treesize of output 19 [2021-12-18 20:12:39,695 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-18 20:12:39,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-18 20:12:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 11 proven. 575 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:12:39,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:41,702 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_5078 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5078))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) .cse1)) (= 0 .cse1))))) is different from false [2021-12-18 20:12:41,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:12:41,707 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:12:41,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:12:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:12:41,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:12:41,731 INFO L388 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 68 treesize of output 64 [2021-12-18 20:12:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 11 proven. 575 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-18 20:12:42,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701087070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:42,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:42,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 35, 35] total 97 [2021-12-18 20:12:42,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534887731] [2021-12-18 20:12:42,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:42,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-18 20:12:42,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:42,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-18 20:12:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=8860, Unknown=1, NotChecked=188, Total=9312 [2021-12-18 20:12:42,557 INFO L87 Difference]: Start difference. First operand 5646 states and 6304 transitions. Second operand has 97 states, 97 states have (on average 3.9896907216494846) internal successors, (387), 97 states have internal predecessors, (387), 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) [2021-12-18 20:12:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:12:51,210 INFO L93 Difference]: Finished difference Result 6287 states and 7012 transitions. [2021-12-18 20:12:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-18 20:12:51,211 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.9896907216494846) internal successors, (387), 97 states have internal predecessors, (387), 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 171 [2021-12-18 20:12:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:12:51,215 INFO L225 Difference]: With dead ends: 6287 [2021-12-18 20:12:51,215 INFO L226 Difference]: Without dead ends: 6284 [2021-12-18 20:12:51,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 287 SyntacticMatches, 15 SemanticMatches, 167 ConstructedPredicates, 1 IntricatePredicates, 13 DeprecatedPredicates, 5441 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1227, Invalid=26832, Unknown=1, NotChecked=332, Total=28392 [2021-12-18 20:12:51,216 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 303 mSDsluCounter, 7034 mSDsCounter, 0 mSdLazyCounter, 4715 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 7139 SdHoareTripleChecker+Invalid, 6660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 4715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1839 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-18 20:12:51,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 7139 Invalid, 6660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 4715 Invalid, 0 Unknown, 1839 Unchecked, 1.9s Time] [2021-12-18 20:12:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-12-18 20:12:51,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 5783. [2021-12-18 20:12:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5781 states have (on average 1.117972669088393) internal successors, (6463), 5782 states have internal predecessors, (6463), 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) [2021-12-18 20:12:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 6463 transitions. [2021-12-18 20:12:51,246 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 6463 transitions. Word has length 171 [2021-12-18 20:12:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:12:51,246 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 6463 transitions. [2021-12-18 20:12:51,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.9896907216494846) internal successors, (387), 97 states have internal predecessors, (387), 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) [2021-12-18 20:12:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 6463 transitions. [2021-12-18 20:12:51,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-18 20:12:51,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:12:51,249 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:12:51,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-12-18 20:12:51,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-12-18 20:12:51,456 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:12:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:12:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 95985211, now seen corresponding path program 25 times [2021-12-18 20:12:51,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:12:51,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971882188] [2021-12-18 20:12:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:12:51,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:12:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 51 proven. 766 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:12:52,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:12:52,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971882188] [2021-12-18 20:12:52,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971882188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:12:52,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598843939] [2021-12-18 20:12:52,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:12:52,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:12:52,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:12:52,429 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:12:52,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-12-18 20:12:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:12:52,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-18 20:12:52,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:12:53,176 INFO L388 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 14 treesize of output 10 [2021-12-18 20:12:53,506 INFO L388 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 15 treesize of output 7 [2021-12-18 20:12:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 51 proven. 535 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:12:53,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:12:53,761 INFO L388 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 15 treesize of output 13 [2021-12-18 20:12:53,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:12:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 51 proven. 535 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:12:54,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598843939] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:12:54,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:12:54,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30, 30] total 63 [2021-12-18 20:12:54,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820969560] [2021-12-18 20:12:54,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:12:54,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-18 20:12:54,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:12:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-18 20:12:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3718, Unknown=0, NotChecked=0, Total=3906 [2021-12-18 20:12:54,024 INFO L87 Difference]: Start difference. First operand 5783 states and 6463 transitions. Second operand has 63 states, 63 states have (on average 3.984126984126984) internal successors, (251), 63 states have internal predecessors, (251), 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) [2021-12-18 20:13:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:13:02,395 INFO L93 Difference]: Finished difference Result 13779 states and 15273 transitions. [2021-12-18 20:13:02,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-12-18 20:13:02,396 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.984126984126984) internal successors, (251), 63 states have internal predecessors, (251), 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 175 [2021-12-18 20:13:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:13:02,405 INFO L225 Difference]: With dead ends: 13779 [2021-12-18 20:13:02,405 INFO L226 Difference]: Without dead ends: 13716 [2021-12-18 20:13:02,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 325 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 5419 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1962, Invalid=22530, Unknown=0, NotChecked=0, Total=24492 [2021-12-18 20:13:02,406 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 5213 mSDsluCounter, 7060 mSDsCounter, 0 mSdLazyCounter, 8570 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5213 SdHoareTripleChecker+Valid, 7264 SdHoareTripleChecker+Invalid, 9254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 8570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:13:02,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5213 Valid, 7264 Invalid, 9254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 8570 Invalid, 0 Unknown, 289 Unchecked, 3.0s Time] [2021-12-18 20:13:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13716 states. [2021-12-18 20:13:02,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13716 to 6600. [2021-12-18 20:13:02,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6600 states, 6598 states have (on average 1.1186723249469537) internal successors, (7381), 6599 states have internal predecessors, (7381), 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) [2021-12-18 20:13:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6600 states to 6600 states and 7381 transitions. [2021-12-18 20:13:02,476 INFO L78 Accepts]: Start accepts. Automaton has 6600 states and 7381 transitions. Word has length 175 [2021-12-18 20:13:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:13:02,476 INFO L470 AbstractCegarLoop]: Abstraction has 6600 states and 7381 transitions. [2021-12-18 20:13:02,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.984126984126984) internal successors, (251), 63 states have internal predecessors, (251), 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) [2021-12-18 20:13:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6600 states and 7381 transitions. [2021-12-18 20:13:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-18 20:13:02,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:13:02,479 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:13:02,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-12-18 20:13:02,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-12-18 20:13:02,681 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:13:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:13:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1177050420, now seen corresponding path program 20 times [2021-12-18 20:13:02,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:13:02,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353348426] [2021-12-18 20:13:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:13:02,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:13:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:13:03,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:13:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353348426] [2021-12-18 20:13:03,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353348426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:13:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802774245] [2021-12-18 20:13:03,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:13:03,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:03,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:13:03,437 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:13:03,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-12-18 20:13:03,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:13:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:13:03,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-18 20:13:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:13:03,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:13:04,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:13:04,366 INFO L388 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 17 treesize of output 19 [2021-12-18 20:13:04,711 INFO L388 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 15 treesize of output 7 [2021-12-18 20:13:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:13:04,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:13:05,007 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5249 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_5249) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 10)) 0)) is different from false [2021-12-18 20:13:05,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:05,017 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:13:05,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:13:05,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:13:05,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:13:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 101 proven. 705 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:13:05,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802774245] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:13:05,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:13:05,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 29] total 54 [2021-12-18 20:13:05,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166185490] [2021-12-18 20:13:05,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:13:05,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-18 20:13:05,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:13:05,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-18 20:13:05,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2631, Unknown=1, NotChecked=102, Total=2862 [2021-12-18 20:13:05,363 INFO L87 Difference]: Start difference. First operand 6600 states and 7381 transitions. Second operand has 54 states, 54 states have (on average 4.777777777777778) internal successors, (258), 54 states have internal predecessors, (258), 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) [2021-12-18 20:13:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:13:07,883 INFO L93 Difference]: Finished difference Result 12333 states and 13750 transitions. [2021-12-18 20:13:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-18 20:13:07,883 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.777777777777778) internal successors, (258), 54 states have internal predecessors, (258), 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 177 [2021-12-18 20:13:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:13:07,889 INFO L225 Difference]: With dead ends: 12333 [2021-12-18 20:13:07,890 INFO L226 Difference]: Without dead ends: 8629 [2021-12-18 20:13:07,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=272, Invalid=5737, Unknown=1, NotChecked=152, Total=6162 [2021-12-18 20:13:07,890 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 137 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 4757 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3437 SdHoareTripleChecker+Invalid, 5001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-18 20:13:07,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 3437 Invalid, 5001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4757 Invalid, 0 Unknown, 230 Unchecked, 1.6s Time] [2021-12-18 20:13:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8629 states. [2021-12-18 20:13:07,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8629 to 8546. [2021-12-18 20:13:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8546 states, 8544 states have (on average 1.1205524344569289) internal successors, (9574), 8545 states have internal predecessors, (9574), 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) [2021-12-18 20:13:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8546 states to 8546 states and 9574 transitions. [2021-12-18 20:13:07,947 INFO L78 Accepts]: Start accepts. Automaton has 8546 states and 9574 transitions. Word has length 177 [2021-12-18 20:13:07,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:13:07,947 INFO L470 AbstractCegarLoop]: Abstraction has 8546 states and 9574 transitions. [2021-12-18 20:13:07,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.777777777777778) internal successors, (258), 54 states have internal predecessors, (258), 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) [2021-12-18 20:13:07,947 INFO L276 IsEmpty]: Start isEmpty. Operand 8546 states and 9574 transitions. [2021-12-18 20:13:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-18 20:13:07,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:13:07,965 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:13:07,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-12-18 20:13:08,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-12-18 20:13:08,166 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:13:08,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:13:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1111766495, now seen corresponding path program 13 times [2021-12-18 20:13:08,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:13:08,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182483599] [2021-12-18 20:13:08,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:13:08,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:13:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 12 proven. 800 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-18 20:13:09,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:13:09,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182483599] [2021-12-18 20:13:09,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182483599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:13:09,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981503292] [2021-12-18 20:13:09,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-18 20:13:09,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:09,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:13:09,904 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:13:09,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-18 20:13:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:10,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-18 20:13:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:13:10,824 INFO L388 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 14 treesize of output 10 [2021-12-18 20:13:12,214 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-12-18 20:13:12,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2021-12-18 20:13:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 56 proven. 564 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-18 20:13:12,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:13:13,183 INFO L388 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 15 treesize of output 13 [2021-12-18 20:13:13,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2021-12-18 20:13:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 56 proven. 564 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-18 20:13:13,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981503292] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:13:13,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:13:13,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 28, 28] total 86 [2021-12-18 20:13:13,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444091335] [2021-12-18 20:13:13,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:13:13,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-18 20:13:13,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:13:13,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-18 20:13:13,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=7079, Unknown=0, NotChecked=0, Total=7310 [2021-12-18 20:13:13,509 INFO L87 Difference]: Start difference. First operand 8546 states and 9574 transitions. Second operand has 86 states, 86 states have (on average 4.488372093023256) internal successors, (386), 86 states have internal predecessors, (386), 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) [2021-12-18 20:13:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:13:28,102 INFO L93 Difference]: Finished difference Result 9566 states and 10581 transitions. [2021-12-18 20:13:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-18 20:13:28,102 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 4.488372093023256) internal successors, (386), 86 states have internal predecessors, (386), 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 178 [2021-12-18 20:13:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:13:28,108 INFO L225 Difference]: With dead ends: 9566 [2021-12-18 20:13:28,108 INFO L226 Difference]: Without dead ends: 7729 [2021-12-18 20:13:28,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 314 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 12 DeprecatedPredicates, 8531 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=2290, Invalid=36716, Unknown=0, NotChecked=0, Total=39006 [2021-12-18 20:13:28,110 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 2150 mSDsluCounter, 11191 mSDsCounter, 0 mSdLazyCounter, 12779 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2150 SdHoareTripleChecker+Valid, 11426 SdHoareTripleChecker+Invalid, 15901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 12779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2696 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:13:28,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2150 Valid, 11426 Invalid, 15901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 12779 Invalid, 0 Unknown, 2696 Unchecked, 5.1s Time] [2021-12-18 20:13:28,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7729 states. [2021-12-18 20:13:28,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7729 to 6585. [2021-12-18 20:13:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6585 states, 6583 states have (on average 1.1152969770621297) internal successors, (7342), 6584 states have internal predecessors, (7342), 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) [2021-12-18 20:13:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6585 states to 6585 states and 7342 transitions. [2021-12-18 20:13:28,161 INFO L78 Accepts]: Start accepts. Automaton has 6585 states and 7342 transitions. Word has length 178 [2021-12-18 20:13:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:13:28,162 INFO L470 AbstractCegarLoop]: Abstraction has 6585 states and 7342 transitions. [2021-12-18 20:13:28,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 4.488372093023256) internal successors, (386), 86 states have internal predecessors, (386), 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) [2021-12-18 20:13:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 6585 states and 7342 transitions. [2021-12-18 20:13:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-18 20:13:28,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:13:28,165 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:13:28,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-12-18 20:13:28,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:28,365 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:13:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:13:28,366 INFO L85 PathProgramCache]: Analyzing trace with hash 127470782, now seen corresponding path program 26 times [2021-12-18 20:13:28,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:13:28,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518722404] [2021-12-18 20:13:28,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:13:28,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:13:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 153 proven. 474 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:13:28,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:13:28,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518722404] [2021-12-18 20:13:28,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518722404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:13:28,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905568669] [2021-12-18 20:13:28,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:13:28,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:28,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:13:28,781 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:13:28,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-12-18 20:13:29,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:13:29,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:13:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-18 20:13:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:13:29,100 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:13:29,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:13:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 190 proven. 437 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:13:30,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:13:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 231 proven. 396 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:13:32,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905568669] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:13:32,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:13:32,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 80 [2021-12-18 20:13:32,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750365426] [2021-12-18 20:13:32,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:13:32,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-18 20:13:32,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:13:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-18 20:13:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=676, Invalid=5804, Unknown=0, NotChecked=0, Total=6480 [2021-12-18 20:13:32,135 INFO L87 Difference]: Start difference. First operand 6585 states and 7342 transitions. Second operand has 81 states, 80 states have (on average 5.05) internal successors, (404), 81 states have internal predecessors, (404), 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) [2021-12-18 20:13:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:13:36,354 INFO L93 Difference]: Finished difference Result 7807 states and 8592 transitions. [2021-12-18 20:13:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-18 20:13:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 5.05) internal successors, (404), 81 states have internal predecessors, (404), 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 179 [2021-12-18 20:13:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:13:36,361 INFO L225 Difference]: With dead ends: 7807 [2021-12-18 20:13:36,361 INFO L226 Difference]: Without dead ends: 7807 [2021-12-18 20:13:36,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2933, Invalid=12567, Unknown=0, NotChecked=0, Total=15500 [2021-12-18 20:13:36,362 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 1212 mSDsluCounter, 3224 mSDsCounter, 0 mSdLazyCounter, 6899 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 6998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 6899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:13:36,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1212 Valid, 3368 Invalid, 6998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 6899 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-18 20:13:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2021-12-18 20:13:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6725. [2021-12-18 20:13:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6723 states have (on average 1.1157221478506618) internal successors, (7501), 6724 states have internal predecessors, (7501), 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) [2021-12-18 20:13:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 7501 transitions. [2021-12-18 20:13:36,414 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 7501 transitions. Word has length 179 [2021-12-18 20:13:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:13:36,414 INFO L470 AbstractCegarLoop]: Abstraction has 6725 states and 7501 transitions. [2021-12-18 20:13:36,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 5.05) internal successors, (404), 81 states have internal predecessors, (404), 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) [2021-12-18 20:13:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 7501 transitions. [2021-12-18 20:13:36,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-18 20:13:36,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:13:36,417 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:13:36,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-12-18 20:13:36,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:36,617 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:13:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:13:36,618 INFO L85 PathProgramCache]: Analyzing trace with hash 366672207, now seen corresponding path program 21 times [2021-12-18 20:13:36,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:13:36,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017776477] [2021-12-18 20:13:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:13:36,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:13:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 153 proven. 694 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:13:36,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:13:36,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017776477] [2021-12-18 20:13:36,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017776477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:13:36,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088675954] [2021-12-18 20:13:36,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:13:36,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:36,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:13:36,981 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:13:36,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-12-18 20:13:37,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-18 20:13:37,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:13:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-18 20:13:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:13:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 190 proven. 657 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:13:38,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:13:39,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 5 [2021-12-18 20:13:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 190 proven. 657 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:13:39,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088675954] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:13:39,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:13:39,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 68 [2021-12-18 20:13:39,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550356818] [2021-12-18 20:13:39,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:13:39,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-18 20:13:39,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:13:39,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-18 20:13:39,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=4011, Unknown=0, NotChecked=0, Total=4692 [2021-12-18 20:13:39,470 INFO L87 Difference]: Start difference. First operand 6725 states and 7501 transitions. Second operand has 69 states, 68 states have (on average 7.102941176470588) internal successors, (483), 69 states have internal predecessors, (483), 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) [2021-12-18 20:13:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:13:40,949 INFO L93 Difference]: Finished difference Result 8175 states and 9054 transitions. [2021-12-18 20:13:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-18 20:13:40,949 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 7.102941176470588) internal successors, (483), 69 states have internal predecessors, (483), 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 181 [2021-12-18 20:13:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:13:40,955 INFO L225 Difference]: With dead ends: 8175 [2021-12-18 20:13:40,955 INFO L226 Difference]: Without dead ends: 8175 [2021-12-18 20:13:40,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1946, Invalid=7174, Unknown=0, NotChecked=0, Total=9120 [2021-12-18 20:13:40,956 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1914 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-18 20:13:40,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 1027 Invalid, 2380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 2076 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-18 20:13:40,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2021-12-18 20:13:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 7239. [2021-12-18 20:13:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7239 states, 7237 states have (on average 1.1155174796186265) internal successors, (8073), 7238 states have internal predecessors, (8073), 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) [2021-12-18 20:13:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7239 states to 7239 states and 8073 transitions. [2021-12-18 20:13:40,998 INFO L78 Accepts]: Start accepts. Automaton has 7239 states and 8073 transitions. Word has length 181 [2021-12-18 20:13:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:13:40,998 INFO L470 AbstractCegarLoop]: Abstraction has 7239 states and 8073 transitions. [2021-12-18 20:13:40,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 7.102941176470588) internal successors, (483), 69 states have internal predecessors, (483), 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) [2021-12-18 20:13:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 7239 states and 8073 transitions. [2021-12-18 20:13:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-18 20:13:41,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:13:41,001 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:13:41,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-12-18 20:13:41,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-12-18 20:13:41,201 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:13:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:13:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash 941546850, now seen corresponding path program 27 times [2021-12-18 20:13:41,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:13:41,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193900032] [2021-12-18 20:13:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:13:41,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:13:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:13:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 56 proven. 880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:13:43,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:13:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193900032] [2021-12-18 20:13:43,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193900032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:13:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436472925] [2021-12-18 20:13:43,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:13:43,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:13:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:13:43,137 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:13:43,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-12-18 20:13:45,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-18 20:13:45,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:13:45,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-18 20:13:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:13:45,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:13:45,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:13:46,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:13:46,690 INFO L388 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 17 treesize of output 19 [2021-12-18 20:14:32,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:14:32,934 INFO L354 Elim1Store]: treesize reduction 2, result has 86.7 percent of original size [2021-12-18 20:14:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 27 [2021-12-18 20:14:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 445 proven. 253 refuted. 7 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:14:33,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:14:36,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:14:36,384 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2021-12-18 20:14:36,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:14:36,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 112 [2021-12-18 20:14:36,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:14:36,409 INFO L388 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 64 treesize of output 62 [2021-12-18 20:14:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 397 proven. 308 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:14:39,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436472925] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:14:39,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:14:39,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 37, 37] total 115 [2021-12-18 20:14:39,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664270598] [2021-12-18 20:14:39,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:14:39,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-12-18 20:14:39,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:14:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-12-18 20:14:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=12313, Unknown=2, NotChecked=0, Total=13110 [2021-12-18 20:14:39,174 INFO L87 Difference]: Start difference. First operand 7239 states and 8073 transitions. Second operand has 115 states, 115 states have (on average 4.060869565217391) internal successors, (467), 115 states have internal predecessors, (467), 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) [2021-12-18 20:14:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:14:52,119 INFO L93 Difference]: Finished difference Result 7995 states and 8908 transitions. [2021-12-18 20:14:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-18 20:14:52,120 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 4.060869565217391) internal successors, (467), 115 states have internal predecessors, (467), 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 186 [2021-12-18 20:14:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:14:52,125 INFO L225 Difference]: With dead ends: 7995 [2021-12-18 20:14:52,125 INFO L226 Difference]: Without dead ends: 7992 [2021-12-18 20:14:52,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6007 ImplicationChecksByTransitivity, 60.7s TimeCoverageRelationStatistics Valid=2659, Invalid=31749, Unknown=2, NotChecked=0, Total=34410 [2021-12-18 20:14:52,127 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 457 mSDsluCounter, 6914 mSDsCounter, 0 mSdLazyCounter, 4542 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 7036 SdHoareTripleChecker+Invalid, 5613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 4542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 942 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-18 20:14:52,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 7036 Invalid, 5613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 4542 Invalid, 0 Unknown, 942 Unchecked, 2.0s Time] [2021-12-18 20:14:52,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2021-12-18 20:14:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 7387. [2021-12-18 20:14:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7387 states, 7385 states have (on average 1.1164522681110358) internal successors, (8245), 7386 states have internal predecessors, (8245), 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) [2021-12-18 20:14:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7387 states to 7387 states and 8245 transitions. [2021-12-18 20:14:52,179 INFO L78 Accepts]: Start accepts. Automaton has 7387 states and 8245 transitions. Word has length 186 [2021-12-18 20:14:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:14:52,179 INFO L470 AbstractCegarLoop]: Abstraction has 7387 states and 8245 transitions. [2021-12-18 20:14:52,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 4.060869565217391) internal successors, (467), 115 states have internal predecessors, (467), 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) [2021-12-18 20:14:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 7387 states and 8245 transitions. [2021-12-18 20:14:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-18 20:14:52,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:14:52,183 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:14:52,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-12-18 20:14:52,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-12-18 20:14:52,397 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:14:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:14:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1561406015, now seen corresponding path program 28 times [2021-12-18 20:14:52,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:14:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442683244] [2021-12-18 20:14:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:14:52,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:14:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:14:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 56 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:14:53,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:14:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442683244] [2021-12-18 20:14:53,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442683244] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:14:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369527785] [2021-12-18 20:14:53,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:14:53,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:14:53,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:14:53,486 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:14:53,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-12-18 20:14:53,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:14:53,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:14:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-18 20:14:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:14:53,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:14:53,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:14:54,767 INFO L388 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 13 treesize of output 9 [2021-12-18 20:14:56,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:14:56,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:14:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 452 proven. 253 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:14:56,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:14:57,715 INFO L388 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 13 treesize of output 11 [2021-12-18 20:14:57,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-12-18 20:14:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 981 backedges. 431 proven. 274 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:14:59,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369527785] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:14:59,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:14:59,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 33, 33] total 103 [2021-12-18 20:14:59,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321880307] [2021-12-18 20:14:59,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:14:59,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-18 20:14:59,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:14:59,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-18 20:14:59,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=9772, Unknown=0, NotChecked=0, Total=10506 [2021-12-18 20:14:59,655 INFO L87 Difference]: Start difference. First operand 7387 states and 8245 transitions. Second operand has 103 states, 103 states have (on average 4.466019417475728) internal successors, (460), 103 states have internal predecessors, (460), 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) [2021-12-18 20:15:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:18,371 INFO L93 Difference]: Finished difference Result 7748 states and 8638 transitions. [2021-12-18 20:15:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-12-18 20:15:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 4.466019417475728) internal successors, (460), 103 states have internal predecessors, (460), 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 190 [2021-12-18 20:15:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:18,378 INFO L225 Difference]: With dead ends: 7748 [2021-12-18 20:15:18,378 INFO L226 Difference]: Without dead ends: 7745 [2021-12-18 20:15:18,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 341 SyntacticMatches, 3 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18030 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=5740, Invalid=59030, Unknown=0, NotChecked=0, Total=64770 [2021-12-18 20:15:18,382 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1302 mSDsluCounter, 4924 mSDsCounter, 0 mSdLazyCounter, 5552 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 5048 SdHoareTripleChecker+Invalid, 7077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 5552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1095 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:18,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 5048 Invalid, 7077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 5552 Invalid, 0 Unknown, 1095 Unchecked, 2.2s Time] [2021-12-18 20:15:18,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7745 states. [2021-12-18 20:15:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7745 to 7391. [2021-12-18 20:15:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7391 states, 7389 states have (on average 1.116524563540398) internal successors, (8250), 7390 states have internal predecessors, (8250), 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) [2021-12-18 20:15:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7391 states to 7391 states and 8250 transitions. [2021-12-18 20:15:18,440 INFO L78 Accepts]: Start accepts. Automaton has 7391 states and 8250 transitions. Word has length 190 [2021-12-18 20:15:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:18,441 INFO L470 AbstractCegarLoop]: Abstraction has 7391 states and 8250 transitions. [2021-12-18 20:15:18,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 4.466019417475728) internal successors, (460), 103 states have internal predecessors, (460), 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) [2021-12-18 20:15:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 7391 states and 8250 transitions. [2021-12-18 20:15:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-18 20:15:18,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:18,445 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:18,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:18,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-12-18 20:15:18,646 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:15:18,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:18,646 INFO L85 PathProgramCache]: Analyzing trace with hash -685373861, now seen corresponding path program 22 times [2021-12-18 20:15:18,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:18,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807030777] [2021-12-18 20:15:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:18,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 111 proven. 858 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:15:19,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807030777] [2021-12-18 20:15:19,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807030777] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570828277] [2021-12-18 20:15:19,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-18 20:15:19,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:19,499 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:19,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-12-18 20:15:19,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-18 20:15:19,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:15:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-18 20:15:19,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:19,852 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:15:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:15:21,068 INFO L388 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 13 treesize of output 9 [2021-12-18 20:15:21,153 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:15:21,154 INFO L388 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 16 treesize of output 22 [2021-12-18 20:15:21,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 treesize of output 3 [2021-12-18 20:15:31,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-18 20:15:31,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-18 20:15:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 709 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:31,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:15:33,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:15:33,241 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-18 20:15:33,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:15:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-12-18 20:15:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-12-18 20:15:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 666 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:15:35,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570828277] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:15:35,433 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:15:35,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 35] total 100 [2021-12-18 20:15:35,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447936434] [2021-12-18 20:15:35,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:15:35,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-12-18 20:15:35,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:35,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-12-18 20:15:35,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=9115, Unknown=3, NotChecked=0, Total=9900 [2021-12-18 20:15:35,434 INFO L87 Difference]: Start difference. First operand 7391 states and 8250 transitions. Second operand has 100 states, 100 states have (on average 5.46) internal successors, (546), 100 states have internal predecessors, (546), 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) [2021-12-18 20:15:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:41,424 INFO L93 Difference]: Finished difference Result 8780 states and 9738 transitions. [2021-12-18 20:15:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-18 20:15:41,425 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 5.46) internal successors, (546), 100 states have internal predecessors, (546), 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 192 [2021-12-18 20:15:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:41,431 INFO L225 Difference]: With dead ends: 8780 [2021-12-18 20:15:41,431 INFO L226 Difference]: Without dead ends: 8614 [2021-12-18 20:15:41,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 351 SyntacticMatches, 9 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6442 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=2049, Invalid=27359, Unknown=4, NotChecked=0, Total=29412 [2021-12-18 20:15:41,433 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 394 mSDsluCounter, 1856 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:41,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 1900 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1861 Invalid, 0 Unknown, 227 Unchecked, 0.7s Time] [2021-12-18 20:15:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8614 states. [2021-12-18 20:15:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8614 to 8611. [2021-12-18 20:15:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8611 states, 8609 states have (on average 1.1115112091996748) internal successors, (9569), 8610 states have internal predecessors, (9569), 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) [2021-12-18 20:15:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8611 states to 8611 states and 9569 transitions. [2021-12-18 20:15:41,481 INFO L78 Accepts]: Start accepts. Automaton has 8611 states and 9569 transitions. Word has length 192 [2021-12-18 20:15:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:41,481 INFO L470 AbstractCegarLoop]: Abstraction has 8611 states and 9569 transitions. [2021-12-18 20:15:41,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 5.46) internal successors, (546), 100 states have internal predecessors, (546), 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) [2021-12-18 20:15:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 8611 states and 9569 transitions. [2021-12-18 20:15:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-18 20:15:41,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:41,485 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 11, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:41,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:41,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:41,686 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:15:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1587652303, now seen corresponding path program 14 times [2021-12-18 20:15:41,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:41,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606660477] [2021-12-18 20:15:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:41,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 477 proven. 274 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:15:42,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:42,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606660477] [2021-12-18 20:15:42,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606660477] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:42,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170803109] [2021-12-18 20:15:42,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 20:15:42,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:42,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:42,048 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:42,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-12-18 20:15:42,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 20:15:42,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:15:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-18 20:15:42,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:42,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:15:42,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:15:42,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:15:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 479 proven. 272 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:15:43,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:15:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 478 proven. 273 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:15:44,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170803109] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:15:44,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:15:44,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 72 [2021-12-18 20:15:44,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471535846] [2021-12-18 20:15:44,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:15:44,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-12-18 20:15:44,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-12-18 20:15:44,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=4285, Unknown=0, NotChecked=0, Total=5112 [2021-12-18 20:15:44,425 INFO L87 Difference]: Start difference. First operand 8611 states and 9569 transitions. Second operand has 72 states, 72 states have (on average 5.152777777777778) internal successors, (371), 72 states have internal predecessors, (371), 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) [2021-12-18 20:15:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:47,409 INFO L93 Difference]: Finished difference Result 17037 states and 18656 transitions. [2021-12-18 20:15:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-18 20:15:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 5.152777777777778) internal successors, (371), 72 states have internal predecessors, (371), 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 193 [2021-12-18 20:15:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:47,421 INFO L225 Difference]: With dead ends: 17037 [2021-12-18 20:15:47,421 INFO L226 Difference]: Without dead ends: 15815 [2021-12-18 20:15:47,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3841 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3642, Invalid=14180, Unknown=0, NotChecked=0, Total=17822 [2021-12-18 20:15:47,422 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 425 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 3523 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1824 SdHoareTripleChecker+Invalid, 3617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:47,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 1824 Invalid, 3617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3523 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-18 20:15:47,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15815 states. [2021-12-18 20:15:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15815 to 7671. [2021-12-18 20:15:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7671 states, 7669 states have (on average 1.1103142521841178) internal successors, (8515), 7670 states have internal predecessors, (8515), 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) [2021-12-18 20:15:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7671 states to 7671 states and 8515 transitions. [2021-12-18 20:15:47,488 INFO L78 Accepts]: Start accepts. Automaton has 7671 states and 8515 transitions. Word has length 193 [2021-12-18 20:15:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:47,489 INFO L470 AbstractCegarLoop]: Abstraction has 7671 states and 8515 transitions. [2021-12-18 20:15:47,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 5.152777777777778) internal successors, (371), 72 states have internal predecessors, (371), 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) [2021-12-18 20:15:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7671 states and 8515 transitions. [2021-12-18 20:15:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-18 20:15:47,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:47,492 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:47,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:47,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:47,692 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:15:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:47,693 INFO L85 PathProgramCache]: Analyzing trace with hash 642508124, now seen corresponding path program 29 times [2021-12-18 20:15:47,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:47,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903762467] [2021-12-18 20:15:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:47,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 190 proven. 560 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:15:48,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903762467] [2021-12-18 20:15:48,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903762467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245983318] [2021-12-18 20:15:48,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:15:48,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:48,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:48,145 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:48,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-12-18 20:15:49,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 20:15:49,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:15:49,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-18 20:15:49,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:49,137 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-18 20:15:49,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-18 20:15:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 231 proven. 519 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:15:50,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:15:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 276 proven. 474 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:15:52,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245983318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:15:52,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:15:52,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 81 [2021-12-18 20:15:52,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133210848] [2021-12-18 20:15:52,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:15:52,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-12-18 20:15:52,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:15:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-12-18 20:15:52,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=5835, Unknown=0, NotChecked=0, Total=6642 [2021-12-18 20:15:52,305 INFO L87 Difference]: Start difference. First operand 7671 states and 8515 transitions. Second operand has 82 states, 81 states have (on average 5.197530864197531) internal successors, (421), 82 states have internal predecessors, (421), 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) [2021-12-18 20:15:55,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:15:55,945 INFO L93 Difference]: Finished difference Result 11792 states and 13028 transitions. [2021-12-18 20:15:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-18 20:15:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 5.197530864197531) internal successors, (421), 82 states have internal predecessors, (421), 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 194 [2021-12-18 20:15:55,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:15:55,953 INFO L225 Difference]: With dead ends: 11792 [2021-12-18 20:15:55,953 INFO L226 Difference]: Without dead ends: 11792 [2021-12-18 20:15:55,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2991 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2751, Invalid=11291, Unknown=0, NotChecked=0, Total=14042 [2021-12-18 20:15:55,954 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 1280 mSDsluCounter, 3030 mSDsCounter, 0 mSdLazyCounter, 6757 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 3187 SdHoareTripleChecker+Invalid, 6860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 6757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-18 20:15:55,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 3187 Invalid, 6860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 6757 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-18 20:15:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11792 states. [2021-12-18 20:15:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11792 to 8737. [2021-12-18 20:15:56,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8737 states, 8735 states have (on average 1.114710933028048) internal successors, (9737), 8736 states have internal predecessors, (9737), 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) [2021-12-18 20:15:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8737 states to 8737 states and 9737 transitions. [2021-12-18 20:15:56,011 INFO L78 Accepts]: Start accepts. Automaton has 8737 states and 9737 transitions. Word has length 194 [2021-12-18 20:15:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:15:56,011 INFO L470 AbstractCegarLoop]: Abstraction has 8737 states and 9737 transitions. [2021-12-18 20:15:56,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 5.197530864197531) internal successors, (421), 82 states have internal predecessors, (421), 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) [2021-12-18 20:15:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 8737 states and 9737 transitions. [2021-12-18 20:15:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-18 20:15:56,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:15:56,015 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:15:56,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-12-18 20:15:56,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:56,215 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:15:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:15:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 49314168, now seen corresponding path program 23 times [2021-12-18 20:15:56,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:15:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768798599] [2021-12-18 20:15:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:15:56,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:15:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:15:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 190 proven. 824 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:15:56,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:15:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768798599] [2021-12-18 20:15:56,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768798599] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:15:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252361586] [2021-12-18 20:15:56,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-18 20:15:56,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:15:56,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:15:56,633 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:15:56,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-12-18 20:15:57,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-12-18 20:15:57,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:15:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-18 20:15:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:15:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-18 20:15:57,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-18 20:15:57,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:15:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 231 proven. 783 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:15:58,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 276 proven. 738 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-18 20:16:00,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252361586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:16:00,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:16:00,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 78 [2021-12-18 20:16:00,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993436546] [2021-12-18 20:16:00,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:00,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-18 20:16:00,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:16:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-18 20:16:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=5470, Unknown=0, NotChecked=0, Total=6162 [2021-12-18 20:16:00,155 INFO L87 Difference]: Start difference. First operand 8737 states and 9737 transitions. Second operand has 79 states, 78 states have (on average 7.282051282051282) internal successors, (568), 79 states have internal predecessors, (568), 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) [2021-12-18 20:16:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:01,786 INFO L93 Difference]: Finished difference Result 14855 states and 16525 transitions. [2021-12-18 20:16:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-18 20:16:01,786 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 7.282051282051282) internal successors, (568), 79 states have internal predecessors, (568), 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 196 [2021-12-18 20:16:01,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:01,799 INFO L225 Difference]: With dead ends: 14855 [2021-12-18 20:16:01,800 INFO L226 Difference]: Without dead ends: 14855 [2021-12-18 20:16:01,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1493, Invalid=7627, Unknown=0, NotChecked=0, Total=9120 [2021-12-18 20:16:01,800 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 497 mSDsluCounter, 1894 mSDsCounter, 0 mSdLazyCounter, 3415 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 1991 SdHoareTripleChecker+Invalid, 3462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:01,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 1991 Invalid, 3462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3415 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-18 20:16:01,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14855 states. [2021-12-18 20:16:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14855 to 9347. [2021-12-18 20:16:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9347 states, 9345 states have (on average 1.1149277688603532) internal successors, (10419), 9346 states have internal predecessors, (10419), 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) [2021-12-18 20:16:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9347 states to 9347 states and 10419 transitions. [2021-12-18 20:16:01,895 INFO L78 Accepts]: Start accepts. Automaton has 9347 states and 10419 transitions. Word has length 196 [2021-12-18 20:16:01,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:01,895 INFO L470 AbstractCegarLoop]: Abstraction has 9347 states and 10419 transitions. [2021-12-18 20:16:01,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 7.282051282051282) internal successors, (568), 79 states have internal predecessors, (568), 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) [2021-12-18 20:16:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9347 states and 10419 transitions. [2021-12-18 20:16:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 20:16:01,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:16:01,901 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:16:01,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:02,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:02,101 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:16:02,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:16:02,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1117286827, now seen corresponding path program 15 times [2021-12-18 20:16:02,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:16:02,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073371577] [2021-12-18 20:16:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:02,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:16:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 13 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:16:04,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:16:04,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073371577] [2021-12-18 20:16:04,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073371577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:04,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261809723] [2021-12-18 20:16:04,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-18 20:16:04,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:16:04,280 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:16:04,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-12-18 20:16:06,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-12-18 20:16:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:16:06,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-18 20:16:06,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:16:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:16:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:16:08,118 INFO L388 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 17 treesize of output 19 [2021-12-18 20:16:08,826 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-18 20:16:08,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-18 20:16:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 13 proven. 824 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:16:08,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:09,406 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6227 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_6227) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)) 0)) is different from false [2021-12-18 20:16:09,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:16:09,411 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-18 20:16:09,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:16:09,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-18 20:16:09,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 7 [2021-12-18 20:16:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 13 proven. 824 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-18 20:16:10,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261809723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:16:10,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:16:10,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 39, 39] total 85 [2021-12-18 20:16:10,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605176224] [2021-12-18 20:16:10,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:10,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-18 20:16:10,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:16:10,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-18 20:16:10,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6757, Unknown=1, NotChecked=164, Total=7140 [2021-12-18 20:16:10,066 INFO L87 Difference]: Start difference. First operand 9347 states and 10419 transitions. Second operand has 85 states, 85 states have (on average 3.4941176470588236) internal successors, (297), 85 states have internal predecessors, (297), 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) [2021-12-18 20:16:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:16,947 INFO L93 Difference]: Finished difference Result 15825 states and 17584 transitions. [2021-12-18 20:16:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-18 20:16:16,947 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.4941176470588236) internal successors, (297), 85 states have internal predecessors, (297), 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 201 [2021-12-18 20:16:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:16,958 INFO L225 Difference]: With dead ends: 15825 [2021-12-18 20:16:16,958 INFO L226 Difference]: Without dead ends: 15825 [2021-12-18 20:16:16,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 368 SyntacticMatches, 8 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=642, Invalid=17451, Unknown=1, NotChecked=266, Total=18360 [2021-12-18 20:16:16,960 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 538 mSDsluCounter, 5757 mSDsCounter, 0 mSdLazyCounter, 10701 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 5854 SdHoareTripleChecker+Invalid, 11331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 10701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:16,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 5854 Invalid, 11331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 10701 Invalid, 0 Unknown, 551 Unchecked, 4.1s Time] [2021-12-18 20:16:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15825 states. [2021-12-18 20:16:17,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15825 to 9756. [2021-12-18 20:16:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9756 states, 9754 states have (on average 1.1161574738568791) internal successors, (10887), 9755 states have internal predecessors, (10887), 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) [2021-12-18 20:16:17,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9756 states to 9756 states and 10887 transitions. [2021-12-18 20:16:17,030 INFO L78 Accepts]: Start accepts. Automaton has 9756 states and 10887 transitions. Word has length 201 [2021-12-18 20:16:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:17,030 INFO L470 AbstractCegarLoop]: Abstraction has 9756 states and 10887 transitions. [2021-12-18 20:16:17,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.4941176470588236) internal successors, (297), 85 states have internal predecessors, (297), 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) [2021-12-18 20:16:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9756 states and 10887 transitions. [2021-12-18 20:16:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-18 20:16:17,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:16:17,035 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:16:17,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:17,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-12-18 20:16:17,236 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:16:17,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:16:17,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1476217084, now seen corresponding path program 30 times [2021-12-18 20:16:17,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:16:17,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706392907] [2021-12-18 20:16:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:17,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:16:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 61 proven. 1050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 20:16:19,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:16:19,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706392907] [2021-12-18 20:16:19,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706392907] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:19,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633576] [2021-12-18 20:16:19,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:16:19,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:19,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:16:19,452 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:16:19,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-12-18 20:16:22,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 20:16:22,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:16:22,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-18 20:16:22,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:16:22,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:16:23,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:16:23,969 INFO L388 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 17 treesize of output 19 [2021-12-18 20:16:26,224 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-18 20:16:26,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-18 20:16:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 13 proven. 822 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:16:26,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 20:16:28,747 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_6346 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_6346))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (= 0 .cse0) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)))))))) is different from false [2021-12-18 20:16:28,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:16:28,752 INFO L388 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2021-12-18 20:16:28,765 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:16:28,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 120 [2021-12-18 20:16:28,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-18 20:16:28,772 INFO L388 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 68 treesize of output 64 [2021-12-18 20:16:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 13 proven. 822 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-18 20:16:29,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 20:16:29,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 20:16:29,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 39, 39] total 109 [2021-12-18 20:16:29,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86734640] [2021-12-18 20:16:29,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 20:16:29,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-12-18 20:16:29,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 20:16:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-12-18 20:16:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=11265, Unknown=1, NotChecked=212, Total=11772 [2021-12-18 20:16:29,633 INFO L87 Difference]: Start difference. First operand 9756 states and 10887 transitions. Second operand has 109 states, 109 states have (on average 4.155963302752293) internal successors, (453), 109 states have internal predecessors, (453), 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) [2021-12-18 20:16:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 20:16:41,056 INFO L93 Difference]: Finished difference Result 15302 states and 17027 transitions. [2021-12-18 20:16:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-18 20:16:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 4.155963302752293) internal successors, (453), 109 states have internal predecessors, (453), 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 201 [2021-12-18 20:16:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 20:16:41,066 INFO L225 Difference]: With dead ends: 15302 [2021-12-18 20:16:41,066 INFO L226 Difference]: Without dead ends: 15299 [2021-12-18 20:16:41,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 341 SyntacticMatches, 17 SemanticMatches, 190 ConstructedPredicates, 1 IntricatePredicates, 15 DeprecatedPredicates, 6979 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=1504, Invalid=34789, Unknown=1, NotChecked=378, Total=36672 [2021-12-18 20:16:41,068 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 398 mSDsluCounter, 10344 mSDsCounter, 0 mSdLazyCounter, 6384 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 10489 SdHoareTripleChecker+Invalid, 9619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 6384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3098 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 20:16:41,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 10489 Invalid, 9619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 6384 Invalid, 0 Unknown, 3098 Unchecked, 2.5s Time] [2021-12-18 20:16:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15299 states. [2021-12-18 20:16:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15299 to 9764. [2021-12-18 20:16:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9764 states, 9762 states have (on average 1.115959844294202) internal successors, (10894), 9763 states have internal predecessors, (10894), 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) [2021-12-18 20:16:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9764 states to 9764 states and 10894 transitions. [2021-12-18 20:16:41,140 INFO L78 Accepts]: Start accepts. Automaton has 9764 states and 10894 transitions. Word has length 201 [2021-12-18 20:16:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 20:16:41,141 INFO L470 AbstractCegarLoop]: Abstraction has 9764 states and 10894 transitions. [2021-12-18 20:16:41,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 4.155963302752293) internal successors, (453), 109 states have internal predecessors, (453), 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) [2021-12-18 20:16:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 9764 states and 10894 transitions. [2021-12-18 20:16:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-18 20:16:41,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 20:16:41,147 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 20:16:41,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-12-18 20:16:41,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-12-18 20:16:41,353 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-18 20:16:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 20:16:41,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1991375554, now seen corresponding path program 6 times [2021-12-18 20:16:41,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 20:16:41,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728018768] [2021-12-18 20:16:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 20:16:41,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 20:16:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 20:16:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1059 backedges. 118 proven. 928 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-18 20:16:41,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 20:16:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728018768] [2021-12-18 20:16:41,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728018768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 20:16:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881069945] [2021-12-18 20:16:41,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-18 20:16:41,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 20:16:41,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 20:16:41,886 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 20:16:41,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-12-18 20:16:42,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-12-18 20:16:42,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 20:16:42,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 89 conjunts are in the unsatisfiable core [2021-12-18 20:16:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 20:16:42,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-18 20:16:43,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-18 20:16:43,131 INFO L388 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 17 treesize of output 19 Killed by 15