./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard-ll.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 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 11:05:32,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 11:05:32,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 11:05:32,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 11:05:32,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 11:05:32,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 11:05:32,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 11:05:32,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 11:05:32,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 11:05:32,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 11:05:32,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 11:05:32,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 11:05:32,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 11:05:32,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 11:05:32,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 11:05:32,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 11:05:32,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 11:05:32,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 11:05:32,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 11:05:32,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 11:05:32,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 11:05:32,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 11:05:32,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 11:05:32,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 11:05:32,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 11:05:32,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 11:05:32,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 11:05:32,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 11:05:32,523 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 11:05:32,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 11:05:32,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 11:05:32,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 11:05:32,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 11:05:32,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 11:05:32,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 11:05:32,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 11:05:32,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 11:05:32,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 11:05:32,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 11:05:32,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 11:05:32,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 11:05:32,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 11:05:32,564 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 11:05:32,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 11:05:32,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 11:05:32,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 11:05:32,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 11:05:32,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 11:05:32,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 11:05:32,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 11:05:32,567 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 11:05:32,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 11:05:32,568 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 11:05:32,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 11:05:32,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 11:05:32,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 11:05:32,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 11:05:32,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 11:05:32,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 11:05:32,569 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 11:05:32,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 11:05:32,570 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 11:05:32,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 11:05:32,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 11:05:32,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 11:05:32,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 11:05:32,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:05:32,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 11:05:32,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 11:05:32,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 11:05:32,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 11:05:32,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 11:05:32,572 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 11:05:32,572 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 11:05:32,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 11:05:32,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 11:05:32,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c31bebbbf1ab8c6e57b91fec88eba145fb9c1b52fce25f48cae26620a3d8ba6 [2021-12-17 11:05:32,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 11:05:32,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 11:05:32,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 11:05:32,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 11:05:32,811 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 11:05:32,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/hard-ll.c [2021-12-17 11:05:32,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb6e8680/7bd502ea5f3e4878badb2d2ada30b3c7/FLAG85bcf4843 [2021-12-17 11:05:33,246 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 11:05:33,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/hard-ll.c [2021-12-17 11:05:33,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb6e8680/7bd502ea5f3e4878badb2d2ada30b3c7/FLAG85bcf4843 [2021-12-17 11:05:33,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bb6e8680/7bd502ea5f3e4878badb2d2ada30b3c7 [2021-12-17 11:05:33,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 11:05:33,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 11:05:33,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 11:05:33,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 11:05:33,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 11:05:33,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d847f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33, skipping insertion in model container [2021-12-17 11:05:33,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 11:05:33,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 11:05:33,466 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/nla-digbench/hard-ll.c[538,551] [2021-12-17 11:05:33,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:05:33,484 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 11:05:33,493 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/nla-digbench/hard-ll.c[538,551] [2021-12-17 11:05:33,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 11:05:33,512 INFO L208 MainTranslator]: Completed translation [2021-12-17 11:05:33,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33 WrapperNode [2021-12-17 11:05:33,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 11:05:33,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 11:05:33,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 11:05:33,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 11:05:33,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,543 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2021-12-17 11:05:33,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 11:05:33,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 11:05:33,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 11:05:33,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 11:05:33,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 11:05:33,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 11:05:33,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 11:05:33,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 11:05:33,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (1/1) ... [2021-12-17 11:05:33,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 11:05:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:33,597 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) [2021-12-17 11:05:33,599 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 [2021-12-17 11:05:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 11:05:33,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 11:05:33,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 11:05:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 11:05:33,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 11:05:33,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 11:05:33,664 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 11:05:33,665 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 11:05:33,750 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 11:05:33,754 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 11:05:33,754 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 11:05:33,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:05:33 BoogieIcfgContainer [2021-12-17 11:05:33,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 11:05:33,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 11:05:33,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 11:05:33,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 11:05:33,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 11:05:33" (1/3) ... [2021-12-17 11:05:33,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c74d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:05:33, skipping insertion in model container [2021-12-17 11:05:33,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 11:05:33" (2/3) ... [2021-12-17 11:05:33,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c74d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 11:05:33, skipping insertion in model container [2021-12-17 11:05:33,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 11:05:33" (3/3) ... [2021-12-17 11:05:33,768 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2021-12-17 11:05:33,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 11:05:33,776 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 11:05:33,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 11:05:33,834 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 [2021-12-17 11:05:33,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 11:05:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 11:05:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 11:05:33,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:33,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:33,857 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2021-12-17 11:05:33,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:33,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720664138] [2021-12-17 11:05:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:33,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:05:33,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720664138] [2021-12-17 11:05:33,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720664138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:33,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:33,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 11:05:33,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5206287] [2021-12-17 11:05:33,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:33,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 11:05:33,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 11:05:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:05:33,998 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:05:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:34,015 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2021-12-17 11:05:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 11:05:34,017 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 11:05:34,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:34,023 INFO L225 Difference]: With dead ends: 49 [2021-12-17 11:05:34,023 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 11:05:34,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 11:05:34,028 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2021-12-17 11:05:34,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 11:05:34,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-17 11:05:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:05:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-12-17 11:05:34,056 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2021-12-17 11:05:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:34,056 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-12-17 11:05:34,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:05:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-12-17 11:05:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 11:05:34,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:34,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:34,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 11:05:34,058 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:34,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2021-12-17 11:05:34,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:34,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393272473] [2021-12-17 11:05:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:34,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:05:34,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:34,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393272473] [2021-12-17 11:05:34,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393272473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:34,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:34,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:05:34,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190081771] [2021-12-17 11:05:34,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:34,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:34,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:34,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:34,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:05:34,206 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:05:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:34,258 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-12-17 11:05:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:05:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 11:05:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:34,270 INFO L225 Difference]: With dead ends: 35 [2021-12-17 11:05:34,271 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 11:05:34,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:05:34,272 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:34,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 11:05:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2021-12-17 11:05:34,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:05:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-12-17 11:05:34,288 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2021-12-17 11:05:34,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:34,289 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-12-17 11:05:34,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 11:05:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2021-12-17 11:05:34,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-17 11:05:34,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:34,293 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:34,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 11:05:34,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:34,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2021-12-17 11:05:34,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:34,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998505687] [2021-12-17 11:05:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:34,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 11:05:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 11:05:34,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:34,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998505687] [2021-12-17 11:05:34,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998505687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:34,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:34,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:05:34,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841554706] [2021-12-17 11:05:34,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:34,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:34,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:34,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:34,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:05:34,411 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:05:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:34,470 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-12-17 11:05:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 11:05:34,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-12-17 11:05:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:34,472 INFO L225 Difference]: With dead ends: 39 [2021-12-17 11:05:34,472 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 11:05:34,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:05:34,473 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:34,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 11:05:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-12-17 11:05:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-17 11:05:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-17 11:05:34,482 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2021-12-17 11:05:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:34,483 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-17 11:05:34,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 11:05:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-17 11:05:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 11:05:34,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:34,485 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:34,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 11:05:34,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2021-12-17 11:05:34,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:34,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936067839] [2021-12-17 11:05:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:34,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:34,507 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:34,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714599366] [2021-12-17 11:05:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:34,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:34,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:34,516 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) [2021-12-17 11:05:34,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 11:05:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:34,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 11:05:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 11:05:34,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:05:34,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936067839] [2021-12-17 11:05:34,781 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:34,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714599366] [2021-12-17 11:05:34,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714599366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:34,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:34,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 11:05:34,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884771740] [2021-12-17 11:05:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:34,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 11:05:34,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:34,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 11:05:34,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 11:05:34,783 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:05:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:34,941 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-12-17 11:05:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 11:05:34,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-12-17 11:05:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:34,944 INFO L225 Difference]: With dead ends: 58 [2021-12-17 11:05:34,944 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 11:05:34,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 11:05:34,953 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:34,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 121 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 11:05:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 11:05:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 11:05:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-17 11:05:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-12-17 11:05:34,967 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 19 [2021-12-17 11:05:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:34,968 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-12-17 11:05:34,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 11:05:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-12-17 11:05:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 11:05:34,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:34,969 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:34,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 11:05:35,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:35,195 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:35,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2021-12-17 11:05:35,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:35,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931609766] [2021-12-17 11:05:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:35,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:35,209 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:35,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083037883] [2021-12-17 11:05:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:35,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:35,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:35,213 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) [2021-12-17 11:05:35,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 11:05:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 11:05:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 11:05:35,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:05:35,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931609766] [2021-12-17 11:05:35,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:35,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083037883] [2021-12-17 11:05:35,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083037883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:05:35,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:05:35,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:05:35,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509153422] [2021-12-17 11:05:35,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:05:35,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:05:35,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:35,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:05:35,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:05:35,385 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:05:35,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:35,438 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-12-17 11:05:35,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:05:35,438 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-12-17 11:05:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:35,440 INFO L225 Difference]: With dead ends: 57 [2021-12-17 11:05:35,440 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 11:05:35,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 11:05:35,441 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:35,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 80 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:05:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 11:05:35,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-17 11:05:35,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 11:05:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-12-17 11:05:35,461 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 26 [2021-12-17 11:05:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:35,461 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-12-17 11:05:35,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 11:05:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-12-17 11:05:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 11:05:35,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:35,463 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:35,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 11:05:35,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:35,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -979933353, now seen corresponding path program 1 times [2021-12-17 11:05:35,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:35,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593995648] [2021-12-17 11:05:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:35,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:35,689 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:35,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51613203] [2021-12-17 11:05:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:35,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:35,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:35,691 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) [2021-12-17 11:05:35,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 11:05:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 11:05:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 11:05:36,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:05:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 11:05:36,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:05:36,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593995648] [2021-12-17 11:05:36,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:05:36,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51613203] [2021-12-17 11:05:36,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51613203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:05:36,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:05:36,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-12-17 11:05:36,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879352142] [2021-12-17 11:05:36,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:05:36,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 11:05:36,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:05:36,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 11:05:36,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-17 11:05:36,202 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 11:05:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:05:36,672 INFO L93 Difference]: Finished difference Result 97 states and 133 transitions. [2021-12-17 11:05:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 11:05:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 36 [2021-12-17 11:05:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:05:36,674 INFO L225 Difference]: With dead ends: 97 [2021-12-17 11:05:36,675 INFO L226 Difference]: Without dead ends: 68 [2021-12-17 11:05:36,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-12-17 11:05:36,676 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 11:05:36,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 136 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 11:05:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-17 11:05:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-17 11:05:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-17 11:05:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-12-17 11:05:36,696 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 36 [2021-12-17 11:05:36,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:05:36,696 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-12-17 11:05:36,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 11:05:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-12-17 11:05:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 11:05:36,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:05:36,699 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:05:36,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 11:05:36,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:36,920 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:05:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:05:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2021-12-17 11:05:36,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:05:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963989551] [2021-12-17 11:05:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:36,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:05:36,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:05:36,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086784837] [2021-12-17 11:05:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:05:36,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:05:36,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:05:36,967 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) [2021-12-17 11:05:37,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 11:05:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:05:37,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 11:05:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:05:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-17 11:05:37,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:06:30,434 WARN L227 SmtUtils]: Spent 31.15s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:08:06,041 WARN L227 SmtUtils]: Spent 30.11s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:09:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-17 11:09:26,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:09:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963989551] [2021-12-17 11:09:26,686 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:09:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086784837] [2021-12-17 11:09:26,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086784837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:09:26,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:09:26,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-12-17 11:09:26,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890307119] [2021-12-17 11:09:26,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:09:26,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-17 11:09:26,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:09:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-17 11:09:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=267, Unknown=5, NotChecked=0, Total=342 [2021-12-17 11:09:26,688 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 11:09:28,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:33,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:35,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:38,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:40,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:46,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 11:09:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:09:47,875 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2021-12-17 11:09:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 11:09:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 56 [2021-12-17 11:09:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:09:47,879 INFO L225 Difference]: With dead ends: 93 [2021-12-17 11:09:47,880 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 11:09:47,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 87.3s TimeCoverageRelationStatistics Valid=127, Invalid=517, Unknown=6, NotChecked=0, Total=650 [2021-12-17 11:09:47,881 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 123 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-12-17 11:09:47,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 129 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 274 Invalid, 6 Unknown, 0 Unchecked, 14.8s Time] [2021-12-17 11:09:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 11:09:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-12-17 11:09:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 25 states have call successors, (25), 9 states have call predecessors, (25), 9 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 11:09:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2021-12-17 11:09:47,892 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 56 [2021-12-17 11:09:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:09:47,892 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2021-12-17 11:09:47,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 16 states have internal predecessors, (32), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 11:09:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2021-12-17 11:09:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 11:09:47,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:09:47,894 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:09:47,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 11:09:48,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:09:48,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:09:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:09:48,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1199454569, now seen corresponding path program 1 times [2021-12-17 11:09:48,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:09:48,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281109350] [2021-12-17 11:09:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:09:48,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:09:48,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:09:48,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72032211] [2021-12-17 11:09:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:09:48,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:09:48,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:09:48,107 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) [2021-12-17 11:09:48,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 11:09:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:09:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-17 11:09:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:11:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 11:11:47,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:12:29,458 WARN L227 SmtUtils]: Spent 6.61s on a formula simplification that was a NOOP. DAG size: 26 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 11:12:40,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:12:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281109350] [2021-12-17 11:12:40,166 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:12:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72032211] [2021-12-17 11:12:40,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72032211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 11:12:40,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 11:12:40,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 11:12:40,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158750838] [2021-12-17 11:12:40,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 11:12:40,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 11:12:40,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:12:40,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 11:12:40,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-12-17 11:12:40,168 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-17 11:12:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:12:44,205 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-12-17 11:12:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 11:12:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 67 [2021-12-17 11:12:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:12:44,207 INFO L225 Difference]: With dead ends: 97 [2021-12-17 11:12:44,207 INFO L226 Difference]: Without dead ends: 81 [2021-12-17 11:12:44,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-12-17 11:12:44,208 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 11:12:44,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 204 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 244 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2021-12-17 11:12:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-17 11:12:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-17 11:12:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 50 states have (on average 1.12) internal successors, (56), 54 states have internal predecessors, (56), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 11:12:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-12-17 11:12:44,218 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 67 [2021-12-17 11:12:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:12:44,219 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-12-17 11:12:44,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-17 11:12:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-12-17 11:12:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 11:12:44,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:12:44,221 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:12:44,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-17 11:12:44,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:12:44,432 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:12:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:12:44,432 INFO L85 PathProgramCache]: Analyzing trace with hash 963307850, now seen corresponding path program 2 times [2021-12-17 11:12:44,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:12:44,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456269094] [2021-12-17 11:12:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:12:44,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:12:44,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:12:44,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884844066] [2021-12-17 11:12:44,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:12:44,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:12:44,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:12:44,449 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) [2021-12-17 11:12:44,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 11:12:44,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:12:44,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:12:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:12:44,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:12:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 11:12:44,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:12:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-17 11:12:44,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:12:44,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456269094] [2021-12-17 11:12:44,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:12:44,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884844066] [2021-12-17 11:12:44,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884844066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 11:12:44,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 11:12:44,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-12-17 11:12:44,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496257407] [2021-12-17 11:12:44,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 11:12:44,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:12:44,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:12:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:12:44,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:12:44,919 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 11:12:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:12:44,966 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2021-12-17 11:12:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:12:44,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 84 [2021-12-17 11:12:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:12:44,968 INFO L225 Difference]: With dead ends: 90 [2021-12-17 11:12:44,968 INFO L226 Difference]: Without dead ends: 83 [2021-12-17 11:12:44,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:12:44,969 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:12:44,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 86 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:12:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-17 11:12:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-12-17 11:12:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-17 11:12:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-12-17 11:12:44,978 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 84 [2021-12-17 11:12:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:12:44,979 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-12-17 11:12:44,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-17 11:12:44,979 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-12-17 11:12:44,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 11:12:44,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:12:44,981 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:12:45,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 11:12:45,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:12:45,195 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:12:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:12:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1412721000, now seen corresponding path program 1 times [2021-12-17 11:12:45,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:12:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550918339] [2021-12-17 11:12:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:12:45,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:12:45,203 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:12:45,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702553136] [2021-12-17 11:12:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:12:45,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:12:45,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:12:45,207 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) [2021-12-17 11:12:45,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 11:12:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 11:12:45,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 11:12:45,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:12:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-17 11:12:45,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 11:12:45,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 11:12:45,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550918339] [2021-12-17 11:12:45,465 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 11:12:45,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702553136] [2021-12-17 11:12:45,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702553136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 11:12:45,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 11:12:45,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 11:12:45,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002814300] [2021-12-17 11:12:45,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 11:12:45,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 11:12:45,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 11:12:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 11:12:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:12:45,469 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 11:12:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 11:12:45,500 INFO L93 Difference]: Finished difference Result 104 states and 122 transitions. [2021-12-17 11:12:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 11:12:45,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 86 [2021-12-17 11:12:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 11:12:45,503 INFO L225 Difference]: With dead ends: 104 [2021-12-17 11:12:45,504 INFO L226 Difference]: Without dead ends: 74 [2021-12-17 11:12:45,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 11:12:45,504 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 11:12:45,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 61 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 11:12:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-17 11:12:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-17 11:12:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 11:12:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-12-17 11:12:45,514 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 86 [2021-12-17 11:12:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 11:12:45,514 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-12-17 11:12:45,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 11:12:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-12-17 11:12:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 11:12:45,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 11:12:45,520 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 11:12:45,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 11:12:45,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:12:45,735 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 11:12:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 11:12:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1193302554, now seen corresponding path program 2 times [2021-12-17 11:12:45,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 11:12:45,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492481164] [2021-12-17 11:12:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 11:12:45,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 11:12:45,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 11:12:45,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437443013] [2021-12-17 11:12:45,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 11:12:45,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 11:12:45,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 11:12:45,746 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) [2021-12-17 11:12:45,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 11:12:45,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 11:12:45,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 11:12:45,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 11:12:45,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 11:12:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 61 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-17 11:12:46,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 11:13:20,702 WARN L227 SmtUtils]: Spent 20.69s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:14:01,774 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse10 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse0 (* .cse10 |c_ULTIMATE.start_main_~p~0#1|))) (or (not (= |c_ULTIMATE.start_main_~d~0#1| .cse0)) (let ((.cse11 (* .cse10 (div |c_ULTIMATE.start_main_~p~0#1| 2))) (.cse12 (* .cse10 |c_ULTIMATE.start_main_~q~0#1|)) (.cse2 (= 0 (mod |c_ULTIMATE.start_main_~p~0#1| 2)))) (let ((.cse1 (= 0 (mod |c_ULTIMATE.start_main_~d~0#1| 2))) (.cse5 (not .cse2)) (.cse6 (+ .cse11 |c_ULTIMATE.start_main_~r~0#1| .cse0 .cse12)) (.cse4 (+ .cse10 .cse11 |c_ULTIMATE.start_main_~r~0#1| .cse0 .cse12)) (.cse7 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse8 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (and (or (<= 0 |c_ULTIMATE.start_main_~d~0#1|) .cse1 (let ((.cse3 (+ .cse7 |c_ULTIMATE.start_main_~d~0#1| .cse8 1))) (and (or .cse2 (= .cse3 .cse4)) (or .cse5 (= .cse3 .cse6))))) (or (and (< |c_ULTIMATE.start_main_~d~0#1| 0) (not .cse1)) (let ((.cse9 (+ .cse7 |c_ULTIMATE.start_main_~d~0#1| .cse8))) (and (or (and (< |c_ULTIMATE.start_main_~p~0#1| 0) .cse5) (= .cse9 .cse6)) (or (= .cse9 .cse4) .cse2 (<= 0 |c_ULTIMATE.start_main_~p~0#1|))))))))))) is different from true [2021-12-17 11:15:46,871 WARN L227 SmtUtils]: Spent 1.00m on a formula simplification that was a NOOP. DAG size: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 11:18:17,088 WARN L838 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) (let ((.cse13 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse10 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse16 (= 0 (mod |c_ULTIMATE.start_main_~d~0#1| 2))) (.cse15 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse17 (+ .cse15 1)) (.cse14 (and (< |c_ULTIMATE.start_main_~d~0#1| 0) (not .cse16))) (.cse18 (= 0 (mod |c_ULTIMATE.start_main_~p~0#1| 2))) (.cse7 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (* .cse13 .cse10)) (.cse11 (* .cse13 |c_ULTIMATE.start_main_~q~0#1|))) (and (or (let ((.cse4 (= 0 (mod .cse10 2))) (.cse12 (* .cse13 (div .cse10 2)))) (let ((.cse3 (+ .cse13 |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse12)) (.cse5 (+ |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse12)) (.cse6 (not .cse4)) (.cse8 (div .cse0 2)) (.cse1 (= 0 (mod .cse0 2)))) (and (or (<= 0 .cse0) .cse1 (let ((.cse2 (+ .cse7 .cse8 1))) (and (or (= .cse2 .cse3) .cse4) (or (= .cse2 .cse5) .cse6)))) (or (let ((.cse9 (+ .cse7 .cse8))) (and (or .cse4 (= .cse9 .cse3) (<= 0 .cse10)) (or (= .cse9 .cse5) (and (< .cse10 0) .cse6)))) (and (< .cse0 0) (not .cse1)))))) (and (or .cse14 (not (= .cse0 .cse15))) (or (<= 0 |c_ULTIMATE.start_main_~d~0#1|) .cse16 (not (= .cse0 .cse17)))) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) (not .cse18))) (or (let ((.cse19 (+ .cse13 .cse0))) (and (or .cse16 (not (= .cse19 .cse17))) (or .cse14 (not (= .cse19 .cse15))))) .cse18 (let ((.cse29 (+ .cse10 1))) (let ((.cse20 (= 0 (mod .cse29 2))) (.cse28 (* .cse13 (div .cse29 2)))) (let ((.cse26 (= 0 (mod (* .cse13 .cse29) 2))) (.cse22 (+ .cse13 |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse28)) (.cse23 (+ |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse28)) (.cse24 (not .cse20)) (.cse25 (div (+ .cse0 .cse13) 2))) (and (or (let ((.cse21 (+ .cse25 .cse7))) (and (or .cse20 (= .cse21 .cse22)) (or (= .cse21 .cse23) .cse24))) (not .cse26)) (or .cse26 (let ((.cse27 (+ .cse25 .cse7 1))) (and (or .cse20 (= .cse27 .cse22)) (or (= .cse27 .cse23) .cse24)))))))) (<= 0 |c_ULTIMATE.start_main_~p~0#1|)))))) is different from false [2021-12-17 11:18:19,091 WARN L860 $PredicateComparison]: unable to prove that (or (<= |c_ULTIMATE.start_main_~d~0#1| |c_ULTIMATE.start_main_~r~0#1|) (let ((.cse13 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse10 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse16 (= 0 (mod |c_ULTIMATE.start_main_~d~0#1| 2))) (.cse15 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse17 (+ .cse15 1)) (.cse14 (and (< |c_ULTIMATE.start_main_~d~0#1| 0) (not .cse16))) (.cse18 (= 0 (mod |c_ULTIMATE.start_main_~p~0#1| 2))) (.cse7 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse0 (* .cse13 .cse10)) (.cse11 (* .cse13 |c_ULTIMATE.start_main_~q~0#1|))) (and (or (let ((.cse4 (= 0 (mod .cse10 2))) (.cse12 (* .cse13 (div .cse10 2)))) (let ((.cse3 (+ .cse13 |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse12)) (.cse5 (+ |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse12)) (.cse6 (not .cse4)) (.cse8 (div .cse0 2)) (.cse1 (= 0 (mod .cse0 2)))) (and (or (<= 0 .cse0) .cse1 (let ((.cse2 (+ .cse7 .cse8 1))) (and (or (= .cse2 .cse3) .cse4) (or (= .cse2 .cse5) .cse6)))) (or (let ((.cse9 (+ .cse7 .cse8))) (and (or .cse4 (= .cse9 .cse3) (<= 0 .cse10)) (or (= .cse9 .cse5) (and (< .cse10 0) .cse6)))) (and (< .cse0 0) (not .cse1)))))) (and (or .cse14 (not (= .cse0 .cse15))) (or (<= 0 |c_ULTIMATE.start_main_~d~0#1|) .cse16 (not (= .cse0 .cse17)))) (and (< |c_ULTIMATE.start_main_~p~0#1| 0) (not .cse18))) (or (let ((.cse19 (+ .cse13 .cse0))) (and (or .cse16 (not (= .cse19 .cse17))) (or .cse14 (not (= .cse19 .cse15))))) .cse18 (let ((.cse29 (+ .cse10 1))) (let ((.cse20 (= 0 (mod .cse29 2))) (.cse28 (* .cse13 (div .cse29 2)))) (let ((.cse26 (= 0 (mod (* .cse13 .cse29) 2))) (.cse22 (+ .cse13 |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse28)) (.cse23 (+ |c_ULTIMATE.start_main_~r~0#1| .cse11 .cse28)) (.cse24 (not .cse20)) (.cse25 (div (+ .cse0 .cse13) 2))) (and (or (let ((.cse21 (+ .cse25 .cse7))) (and (or .cse20 (= .cse21 .cse22)) (or (= .cse21 .cse23) .cse24))) (not .cse26)) (or .cse26 (let ((.cse27 (+ .cse25 .cse7 1))) (and (or .cse20 (= .cse27 .cse22)) (or (= .cse27 .cse23) .cse24)))))))) (<= 0 |c_ULTIMATE.start_main_~p~0#1|)))))) is different from true Killed by 15