./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array9_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array9_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8ae6792b63619c19d32145c9c656ded5ce2ab653945337eaf95cf4eb94965d3b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:07:39,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:07:39,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:07:39,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:07:39,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:07:39,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:07:39,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:07:39,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:07:39,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:07:39,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:07:39,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:07:39,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:07:39,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:07:39,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:07:39,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:07:39,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:07:39,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:07:39,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:07:39,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:07:39,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:07:39,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:07:39,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:07:39,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:07:39,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:07:39,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:07:39,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:07:39,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:07:39,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:07:39,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:07:39,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:07:39,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:07:39,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:07:39,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:07:39,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:07:39,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:07:39,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:07:39,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:07:39,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:07:39,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:07:39,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:07:39,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:07:39,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:07:39,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:07:39,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:07:39,622 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:07:39,622 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:07:39,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:07:39,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:07:39,624 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:07:39,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:07:39,625 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:07:39,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:07:39,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:07:39,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:07:39,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:07:39,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:07:39,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:07:39,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:07:39,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:07:39,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:07:39,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:07:39,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:07:39,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:07:39,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:07:39,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:07:39,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:07:39,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:07:39,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:07:39,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:07:39,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:07:39,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:07:39,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:07:39,630 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:07:39,630 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:07:39,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:07:39,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:07:39,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ae6792b63619c19d32145c9c656ded5ce2ab653945337eaf95cf4eb94965d3b [2021-12-21 10:07:39,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:07:39,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:07:39,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:07:39,830 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:07:39,830 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:07:39,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array9_pattern.c [2021-12-21 10:07:39,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8b0b13d/bd1fa8af16d6499fa10369575b82eaef/FLAG8ba223785 [2021-12-21 10:07:40,272 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:07:40,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array9_pattern.c [2021-12-21 10:07:40,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8b0b13d/bd1fa8af16d6499fa10369575b82eaef/FLAG8ba223785 [2021-12-21 10:07:40,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8b0b13d/bd1fa8af16d6499fa10369575b82eaef [2021-12-21 10:07:40,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:07:40,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:07:40,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:07:40,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:07:40,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:07:40,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dbfb9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40, skipping insertion in model container [2021-12-21 10:07:40,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:07:40,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:07:40,464 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array9_pattern.c[1352,1365] [2021-12-21 10:07:40,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:07:40,487 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:07:40,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array9_pattern.c[1352,1365] [2021-12-21 10:07:40,514 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:07:40,522 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:07:40,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40 WrapperNode [2021-12-21 10:07:40,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:07:40,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:07:40,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:07:40,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:07:40,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,539 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,558 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-12-21 10:07:40,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:07:40,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:07:40,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:07:40,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:07:40,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:07:40,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:07:40,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:07:40,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:07:40,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (1/1) ... [2021-12-21 10:07:40,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:07:40,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:40,641 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) [2021-12-21 10:07:40,683 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 [2021-12-21 10:07:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:07:40,688 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 10:07:40,689 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 10:07:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:07:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:07:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:07:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:07:40,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:07:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:07:40,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:07:40,729 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:07:40,731 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:07:40,905 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:07:40,909 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:07:40,910 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 10:07:40,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:07:40 BoogieIcfgContainer [2021-12-21 10:07:40,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:07:40,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:07:40,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:07:40,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:07:40,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:07:40" (1/3) ... [2021-12-21 10:07:40,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cb3ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:07:40, skipping insertion in model container [2021-12-21 10:07:40,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:07:40" (2/3) ... [2021-12-21 10:07:40,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57cb3ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:07:40, skipping insertion in model container [2021-12-21 10:07:40,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:07:40" (3/3) ... [2021-12-21 10:07:40,916 INFO L111 eAbstractionObserver]: Analyzing ICFG array9_pattern.c [2021-12-21 10:07:40,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:07:40,935 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:07:40,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:07:40,966 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:07:40,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:07:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 10:07:40,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:40,979 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:40,979 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:40,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2021-12-21 10:07:40,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:40,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621960999] [2021-12-21 10:07:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:40,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:41,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 10:07:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:07:41,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:41,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621960999] [2021-12-21 10:07:41,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621960999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:07:41,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:07:41,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:07:41,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489903838] [2021-12-21 10:07:41,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:07:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:07:41,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:07:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:07:41,181 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:07:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:41,194 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-12-21 10:07:41,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:07:41,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-21 10:07:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:41,200 INFO L225 Difference]: With dead ends: 53 [2021-12-21 10:07:41,200 INFO L226 Difference]: Without dead ends: 24 [2021-12-21 10:07:41,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:07:41,204 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:41,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:07:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-21 10:07:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-21 10:07:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-21 10:07:41,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-12-21 10:07:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:41,227 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-21 10:07:41,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 10:07:41,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-21 10:07:41,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 10:07:41,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:41,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:07:41,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:07:41,230 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:41,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2021-12-21 10:07:41,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:41,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951172602] [2021-12-21 10:07:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:41,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:41,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:41,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971668515] [2021-12-21 10:07:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:41,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:41,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:41,256 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) [2021-12-21 10:07:41,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:07:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 10:07:41,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:07:41,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:07:41,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:41,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951172602] [2021-12-21 10:07:41,463 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:41,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971668515] [2021-12-21 10:07:41,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971668515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:07:41,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:07:41,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 10:07:41,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698616231] [2021-12-21 10:07:41,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:07:41,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 10:07:41,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 10:07:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:07:41,470 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:41,554 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-21 10:07:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:07:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-12-21 10:07:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:41,558 INFO L225 Difference]: With dead ends: 50 [2021-12-21 10:07:41,559 INFO L226 Difference]: Without dead ends: 32 [2021-12-21 10:07:41,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:07:41,561 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:41,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:07:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-21 10:07:41,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-21 10:07:41,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-21 10:07:41,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2021-12-21 10:07:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:41,594 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-21 10:07:41,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-21 10:07:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:07:41,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:41,596 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:07:41,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:41,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:41,813 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:41,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2021-12-21 10:07:41,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:41,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880645935] [2021-12-21 10:07:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:41,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:41,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726079137] [2021-12-21 10:07:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:41,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:41,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:41,843 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) [2021-12-21 10:07:41,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:07:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:41,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-21 10:07:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:41,975 INFO L387 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 [2021-12-21 10:07:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:42,050 INFO L387 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 18 [2021-12-21 10:07:42,069 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 10:07:42,389 INFO L387 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 23 treesize of output 22 [2021-12-21 10:07:42,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:42,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2021-12-21 10:07:42,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:42,653 INFO L387 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 12 [2021-12-21 10:07:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:07:42,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:45,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880645935] [2021-12-21 10:07:45,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:45,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726079137] [2021-12-21 10:07:45,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726079137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:07:45,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:07:45,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-21 10:07:45,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555252484] [2021-12-21 10:07:45,227 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:45,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:07:45,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:07:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=414, Unknown=1, NotChecked=0, Total=506 [2021-12-21 10:07:45,229 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:45,456 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-12-21 10:07:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 10:07:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-21 10:07:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:45,458 INFO L225 Difference]: With dead ends: 70 [2021-12-21 10:07:45,458 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 10:07:45,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=161, Invalid=594, Unknown=1, NotChecked=0, Total=756 [2021-12-21 10:07:45,459 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:45,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 148 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-21 10:07:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 10:07:45,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-21 10:07:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:07:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-12-21 10:07:45,466 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2021-12-21 10:07:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:45,466 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-12-21 10:07:45,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-12-21 10:07:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 10:07:45,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:45,467 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:07:45,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:45,680 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,SelfDestructingSolverStorable2 [2021-12-21 10:07:45,680 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:45,681 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2021-12-21 10:07:45,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:45,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694626990] [2021-12-21 10:07:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:45,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:45,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:45,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559193685] [2021-12-21 10:07:45,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:07:45,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:45,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:45,698 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) [2021-12-21 10:07:45,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:07:45,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:07:45,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:07:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:07:45,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:07:45,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694626990] [2021-12-21 10:07:45,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:45,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559193685] [2021-12-21 10:07:45,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559193685] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:07:45,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:07:45,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-21 10:07:45,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462374659] [2021-12-21 10:07:45,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:45,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:07:45,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:45,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:07:45,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:07:45,853 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:07:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:45,923 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-12-21 10:07:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:07:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-21 10:07:45,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:45,925 INFO L225 Difference]: With dead ends: 61 [2021-12-21 10:07:45,925 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 10:07:45,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:07:45,926 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:45,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 110 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:07:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 10:07:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-12-21 10:07:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-21 10:07:45,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 31 [2021-12-21 10:07:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:45,930 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-21 10:07:45,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:07:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-21 10:07:45,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 10:07:45,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:45,931 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:07:45,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:46,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:46,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:46,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1857874167, now seen corresponding path program 3 times [2021-12-21 10:07:46,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:46,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133319222] [2021-12-21 10:07:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:46,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:46,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:46,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33202881] [2021-12-21 10:07:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:07:46,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:46,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:46,190 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) [2021-12-21 10:07:46,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:07:46,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 10:07:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:07:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:07:46,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:07:46,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133319222] [2021-12-21 10:07:46,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33202881] [2021-12-21 10:07:46,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33202881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:07:46,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:07:46,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-12-21 10:07:46,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843916159] [2021-12-21 10:07:46,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:46,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 10:07:46,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:46,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 10:07:46,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:07:46,414 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:07:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:46,498 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-21 10:07:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:07:46,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-12-21 10:07:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:46,499 INFO L225 Difference]: With dead ends: 39 [2021-12-21 10:07:46,500 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 10:07:46,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:07:46,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:46,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 91 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:07:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 10:07:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-12-21 10:07:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-12-21 10:07:46,509 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2021-12-21 10:07:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:46,509 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-12-21 10:07:46,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:07:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-12-21 10:07:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 10:07:46,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:46,510 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] [2021-12-21 10:07:46,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:07:46,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:46,726 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:46,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 4 times [2021-12-21 10:07:46,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:46,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845458713] [2021-12-21 10:07:46,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:46,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:46,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:46,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107466961] [2021-12-21 10:07:46,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:07:46,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:46,760 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) [2021-12-21 10:07:46,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:07:46,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:07:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:07:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 10:07:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:46,881 INFO L387 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 [2021-12-21 10:07:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:46,901 INFO L387 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 18 [2021-12-21 10:07:46,903 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 10:07:46,958 INFO L353 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-21 10:07:46,958 INFO L387 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 1 case distinctions, treesize of input 47 treesize of output 33 [2021-12-21 10:07:47,499 INFO L353 Elim1Store]: treesize reduction 35, result has 30.0 percent of original size [2021-12-21 10:07:47,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 52 [2021-12-21 10:07:47,678 INFO L353 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2021-12-21 10:07:47,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 59 [2021-12-21 10:07:48,055 INFO L353 Elim1Store]: treesize reduction 174, result has 7.0 percent of original size [2021-12-21 10:07:48,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 82 treesize of output 32 [2021-12-21 10:07:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:07:48,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:07:56,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:07:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845458713] [2021-12-21 10:07:56,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:07:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107466961] [2021-12-21 10:07:56,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107466961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:07:56,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:07:56,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-12-21 10:07:56,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555322238] [2021-12-21 10:07:56,105 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:07:56,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 10:07:56,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:07:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 10:07:56,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=928, Unknown=4, NotChecked=0, Total=1122 [2021-12-21 10:07:56,107 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:07:56,458 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-12-21 10:07:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 10:07:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-21 10:07:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:07:56,459 INFO L225 Difference]: With dead ends: 61 [2021-12-21 10:07:56,459 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 10:07:56,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=257, Invalid=1145, Unknown=4, NotChecked=0, Total=1406 [2021-12-21 10:07:56,460 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:07:56,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 222 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2021-12-21 10:07:56,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 10:07:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-12-21 10:07:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:07:56,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-12-21 10:07:56,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 33 [2021-12-21 10:07:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:07:56,466 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-12-21 10:07:56,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:07:56,467 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-12-21 10:07:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-21 10:07:56,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:07:56,467 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] [2021-12-21 10:07:56,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 10:07:56,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:56,668 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:07:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:07:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash -977921513, now seen corresponding path program 1 times [2021-12-21 10:07:56,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:07:56,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119727596] [2021-12-21 10:07:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:56,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:07:56,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:07:56,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174930887] [2021-12-21 10:07:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:07:56,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:07:56,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:07:56,682 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) [2021-12-21 10:07:56,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:07:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:07:56,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-21 10:07:56,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:07:56,776 INFO L387 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 [2021-12-21 10:07:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:56,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:07:56,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 28 treesize of output 28 [2021-12-21 10:07:56,842 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 10:07:56,846 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 10:07:56,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:56,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:56,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-21 10:07:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:57,505 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-21 10:07:57,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 68 [2021-12-21 10:07:58,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:58,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:07:58,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:07:58,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2021-12-21 10:08:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:01,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:08:01,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 22 [2021-12-21 10:08:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:01,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:11,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119727596] [2021-12-21 10:08:11,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174930887] [2021-12-21 10:08:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174930887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:11,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:08:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-21 10:08:11,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268587429] [2021-12-21 10:08:11,864 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:11,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 10:08:11,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 10:08:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=716, Unknown=9, NotChecked=0, Total=870 [2021-12-21 10:08:11,865 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:08:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:13,926 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-12-21 10:08:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 10:08:13,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-12-21 10:08:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:13,928 INFO L225 Difference]: With dead ends: 65 [2021-12-21 10:08:13,928 INFO L226 Difference]: Without dead ends: 61 [2021-12-21 10:08:13,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=194, Invalid=916, Unknown=12, NotChecked=0, Total=1122 [2021-12-21 10:08:13,928 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:13,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 238 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2021-12-21 10:08:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-21 10:08:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-12-21 10:08:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 10:08:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-12-21 10:08:13,936 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 33 [2021-12-21 10:08:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:13,936 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-12-21 10:08:13,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:08:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-12-21 10:08:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:08:13,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:13,937 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:13,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:14,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:14,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1879614779, now seen corresponding path program 5 times [2021-12-21 10:08:14,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:14,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139290148] [2021-12-21 10:08:14,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:14,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:14,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:14,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881707433] [2021-12-21 10:08:14,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:08:14,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:14,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:14,153 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) [2021-12-21 10:08:14,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:08:14,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 10:08:14,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:14,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:08:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:08:14,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:14,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139290148] [2021-12-21 10:08:14,375 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:14,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881707433] [2021-12-21 10:08:14,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881707433] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:14,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:14,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-21 10:08:14,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349947040] [2021-12-21 10:08:14,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:14,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:08:14,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:08:14,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:08:14,377 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:14,471 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-12-21 10:08:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:08:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-21 10:08:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:14,472 INFO L225 Difference]: With dead ends: 87 [2021-12-21 10:08:14,472 INFO L226 Difference]: Without dead ends: 75 [2021-12-21 10:08:14,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-21 10:08:14,473 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:14,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 117 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-21 10:08:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-12-21 10:08:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 10:08:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-12-21 10:08:14,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 35 [2021-12-21 10:08:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:14,481 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-12-21 10:08:14,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-12-21 10:08:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:08:14,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:14,482 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:14,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:14,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:14,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:14,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1373135831, now seen corresponding path program 6 times [2021-12-21 10:08:14,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:14,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789853429] [2021-12-21 10:08:14,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:14,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:14,731 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:14,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201561892] [2021-12-21 10:08:14,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:08:14,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:14,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:14,744 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) [2021-12-21 10:08:14,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:08:14,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 10:08:14,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:08:14,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:14,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:08:15,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789853429] [2021-12-21 10:08:15,005 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201561892] [2021-12-21 10:08:15,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201561892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:15,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:15,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-21 10:08:15,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433429867] [2021-12-21 10:08:15,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:15,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 10:08:15,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 10:08:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:08:15,006 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:15,135 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-12-21 10:08:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:08:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-12-21 10:08:15,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:15,136 INFO L225 Difference]: With dead ends: 74 [2021-12-21 10:08:15,136 INFO L226 Difference]: Without dead ends: 70 [2021-12-21 10:08:15,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-21 10:08:15,137 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:15,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 110 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-21 10:08:15,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-12-21 10:08:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-21 10:08:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-12-21 10:08:15,144 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 35 [2021-12-21 10:08:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:15,145 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-12-21 10:08:15,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-12-21 10:08:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:08:15,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:15,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:15,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:15,350 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,SelfDestructingSolverStorable8 [2021-12-21 10:08:15,350 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:15,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1081807417, now seen corresponding path program 7 times [2021-12-21 10:08:15,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:15,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745826919] [2021-12-21 10:08:15,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:15,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:15,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:15,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373382821] [2021-12-21 10:08:15,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 10:08:15,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:15,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:15,392 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) [2021-12-21 10:08:15,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:08:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:08:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-21 10:08:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:15,489 INFO L387 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 [2021-12-21 10:08:15,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:08:15,526 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 10:08:15,529 INFO L387 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 27 treesize of output 26 [2021-12-21 10:08:15,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-21 10:08:15,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:15,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-12-21 10:08:16,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,403 INFO L353 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2021-12-21 10:08:16,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2021-12-21 10:08:16,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:16,632 INFO L353 Elim1Store]: treesize reduction 164, result has 13.7 percent of original size [2021-12-21 10:08:16,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 103 treesize of output 112 [2021-12-21 10:08:17,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 49 [2021-12-21 10:08:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:17,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:19,865 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_421 Int) (|ULTIMATE.start_main_~index~0#1| Int)) (or (<= (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~index~0#1|) |c_ULTIMATE.start_main_~#array1~0#1.offset|) v_ArrVal_421))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8))))) (div (+ c_~ARR_SIZE~0 2) 3)) (not (<= v_ArrVal_421 (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|))))) is different from false [2021-12-21 10:08:19,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745826919] [2021-12-21 10:08:19,883 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:19,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373382821] [2021-12-21 10:08:19,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373382821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:19,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:08:19,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-21 10:08:19,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457112195] [2021-12-21 10:08:19,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:19,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 10:08:19,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 10:08:19,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=653, Unknown=1, NotChecked=52, Total=812 [2021-12-21 10:08:19,884 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:08:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:20,459 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-12-21 10:08:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 10:08:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-21 10:08:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:20,460 INFO L225 Difference]: With dead ends: 92 [2021-12-21 10:08:20,460 INFO L226 Difference]: Without dead ends: 88 [2021-12-21 10:08:20,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=148, Invalid=847, Unknown=1, NotChecked=60, Total=1056 [2021-12-21 10:08:20,461 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 34 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:20,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 214 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 330 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2021-12-21 10:08:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-21 10:08:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-12-21 10:08:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-21 10:08:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-12-21 10:08:20,481 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 37 [2021-12-21 10:08:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:20,482 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-12-21 10:08:20,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:08:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-12-21 10:08:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:08:20,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:20,484 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:20,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:20,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 10:08:20,702 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:20,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:20,702 INFO L85 PathProgramCache]: Analyzing trace with hash 70690167, now seen corresponding path program 2 times [2021-12-21 10:08:20,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:20,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777137893] [2021-12-21 10:08:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:20,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:20,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:20,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086046404] [2021-12-21 10:08:20,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:20,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:20,735 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) [2021-12-21 10:08:20,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 10:08:20,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:20,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-21 10:08:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:20,834 INFO L387 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 [2021-12-21 10:08:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:20,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:08:20,874 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 10:08:20,877 INFO L387 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 27 treesize of output 26 [2021-12-21 10:08:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:20,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:20,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-12-21 10:08:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-12-21 10:08:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:21,796 INFO L353 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2021-12-21 10:08:21,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 98 [2021-12-21 10:08:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:23,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:23,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:23,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:23,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:23,231 INFO L353 Elim1Store]: treesize reduction 106, result has 29.3 percent of original size [2021-12-21 10:08:23,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 130 [2021-12-21 10:08:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:24,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:08:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:24,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:08:24,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 124 treesize of output 124 [2021-12-21 10:08:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:25,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:30,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777137893] [2021-12-21 10:08:30,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:30,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086046404] [2021-12-21 10:08:30,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086046404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:08:30,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:08:30,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-12-21 10:08:30,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289455928] [2021-12-21 10:08:30,434 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:30,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 10:08:30,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:30,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 10:08:30,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1317, Unknown=3, NotChecked=0, Total=1560 [2021-12-21 10:08:30,436 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:08:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:31,584 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-12-21 10:08:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 10:08:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-21 10:08:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:31,586 INFO L225 Difference]: With dead ends: 107 [2021-12-21 10:08:31,586 INFO L226 Difference]: Without dead ends: 103 [2021-12-21 10:08:31,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=278, Invalid=1524, Unknown=4, NotChecked=0, Total=1806 [2021-12-21 10:08:31,587 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:31,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 341 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 333 Invalid, 0 Unknown, 155 Unchecked, 0.4s Time] [2021-12-21 10:08:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-21 10:08:31,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2021-12-21 10:08:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 10:08:31,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2021-12-21 10:08:31,608 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 37 [2021-12-21 10:08:31,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:31,608 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2021-12-21 10:08:31,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 10:08:31,608 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2021-12-21 10:08:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:08:31,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:31,613 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:31,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:31,830 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,SelfDestructingSolverStorable10 [2021-12-21 10:08:31,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:31,831 INFO L85 PathProgramCache]: Analyzing trace with hash 288075803, now seen corresponding path program 8 times [2021-12-21 10:08:31,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:31,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753376121] [2021-12-21 10:08:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:31,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:31,843 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:31,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612083114] [2021-12-21 10:08:31,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:08:31,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:31,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:31,848 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) [2021-12-21 10:08:31,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 10:08:31,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:08:31,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:08:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:32,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:32,138 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:08:32,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:32,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753376121] [2021-12-21 10:08:32,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:32,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612083114] [2021-12-21 10:08:32,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612083114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:32,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:32,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-21 10:08:32,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357308957] [2021-12-21 10:08:32,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:32,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 10:08:32,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 10:08:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:08:32,141 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:32,322 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-12-21 10:08:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 10:08:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-21 10:08:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:32,327 INFO L225 Difference]: With dead ends: 144 [2021-12-21 10:08:32,327 INFO L226 Difference]: Without dead ends: 130 [2021-12-21 10:08:32,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2021-12-21 10:08:32,343 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 116 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:32,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 136 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-21 10:08:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-12-21 10:08:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 89 states have internal predecessors, (103), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-21 10:08:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-12-21 10:08:32,380 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 39 [2021-12-21 10:08:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:32,380 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-12-21 10:08:32,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-12-21 10:08:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:08:32,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:32,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:32,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 10:08:32,599 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,SelfDestructingSolverStorable11 [2021-12-21 10:08:32,600 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2118006027, now seen corresponding path program 3 times [2021-12-21 10:08:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774055621] [2021-12-21 10:08:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:32,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:32,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:32,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639470102] [2021-12-21 10:08:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:08:32,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:32,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:32,618 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) [2021-12-21 10:08:32,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 10:08:32,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 10:08:32,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:08:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:08:32,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:08:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:08:32,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:08:32,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774055621] [2021-12-21 10:08:32,938 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 10:08:32,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639470102] [2021-12-21 10:08:32,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639470102] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:08:32,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 10:08:32,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-12-21 10:08:32,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987161534] [2021-12-21 10:08:32,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 10:08:32,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 10:08:32,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:08:32,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 10:08:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:08:32,942 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:08:33,132 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-12-21 10:08:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 10:08:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-21 10:08:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:08:33,135 INFO L225 Difference]: With dead ends: 129 [2021-12-21 10:08:33,136 INFO L226 Difference]: Without dead ends: 125 [2021-12-21 10:08:33,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-21 10:08:33,139 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:08:33,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 112 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:08:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-21 10:08:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2021-12-21 10:08:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-21 10:08:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-12-21 10:08:33,168 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 39 [2021-12-21 10:08:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:08:33,168 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-12-21 10:08:33,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 10:08:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-12-21 10:08:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 10:08:33,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:08:33,169 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:08:33,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-21 10:08:33,383 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,SelfDestructingSolverStorable12 [2021-12-21 10:08:33,384 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:08:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:08:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1485008409, now seen corresponding path program 9 times [2021-12-21 10:08:33,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:08:33,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487067935] [2021-12-21 10:08:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:08:33,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:08:33,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 10:08:33,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614361015] [2021-12-21 10:08:33,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:08:33,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:08:33,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:08:33,401 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) [2021-12-21 10:08:33,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 10:08:33,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 10:08:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:08:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-21 10:08:33,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:08:33,551 INFO L387 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 [2021-12-21 10:08:33,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2021-12-21 10:08:33,589 INFO L387 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 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-21 10:08:33,593 INFO L387 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 27 treesize of output 26 [2021-12-21 10:08:33,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-12-21 10:08:33,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 31 treesize of output 29 [2021-12-21 10:08:33,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 [2021-12-21 10:08:33,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 [2021-12-21 10:08:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-21 10:08:33,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 44 treesize of output 40 [2021-12-21 10:08:33,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,783 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-21 10:08:33,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 46 [2021-12-21 10:08:33,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,808 INFO L353 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-12-21 10:08:33,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 40 [2021-12-21 10:08:33,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 83 [2021-12-21 10:08:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,985 INFO L353 Elim1Store]: treesize reduction 70, result has 29.3 percent of original size [2021-12-21 10:08:33,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2021-12-21 10:08:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:33,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:34,024 INFO L353 Elim1Store]: treesize reduction 130, result has 15.0 percent of original size [2021-12-21 10:08:34,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 103 treesize of output 126 [2021-12-21 10:08:37,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:37,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:37,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:37,990 INFO L353 Elim1Store]: treesize reduction 177, result has 36.1 percent of original size [2021-12-21 10:08:37,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 106 treesize of output 186 [2021-12-21 10:08:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:41,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:41,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:41,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:41,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:08:41,938 INFO L353 Elim1Store]: treesize reduction 297, result has 9.5 percent of original size [2021-12-21 10:08:41,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 17 case distinctions, treesize of input 149 treesize of output 164