./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i --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/loop-crafted/simple_array_index_value_2.i -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 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:57:51,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:57:51,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:57:51,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:57:51,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:57:51,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:57:51,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:57:51,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:57:51,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:57:51,664 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:57:51,664 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:57:51,665 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:57:51,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:57:51,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:57:51,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:57:51,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:57:51,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:57:51,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:57:51,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:57:51,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:57:51,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:57:51,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:57:51,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:57:51,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:57:51,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:57:51,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:57:51,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:57:51,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:57:51,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:57:51,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:57:51,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:57:51,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:57:51,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:57:51,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:57:51,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:57:51,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:57:51,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:57:51,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:57:51,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:57:51,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:57:51,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:57:51,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:57:51,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:57:51,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:57:51,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:57:51,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:57:51,698 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:57:51,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:57:51,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:57:51,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:57:51,699 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:57:51,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:57:51,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:57:51,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:57:51,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:57:51,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:57:51,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:57:51,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:57:51,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:57:51,701 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:57:51,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:57:51,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:57:51,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:57:51,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:57:51,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:57:51,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:57:51,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:57:51,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:57:51,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:57:51,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:57:51,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:57:51,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:57:51,703 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:57:51,703 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:57:51,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:57:51,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:57:51,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6dcb150490c6daa5a1cdb1426c8815f073186f609bef3d7e722a6c72be49ca91 [2021-12-17 09:57:51,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:57:51,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:57:51,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:57:51,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:57:51,887 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:57:51,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2021-12-17 09:57:51,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368bb6db6/617e171b3376418f829742947c0bdf1a/FLAG0ce823837 [2021-12-17 09:57:52,295 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:57:52,295 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-crafted/simple_array_index_value_2.i [2021-12-17 09:57:52,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368bb6db6/617e171b3376418f829742947c0bdf1a/FLAG0ce823837 [2021-12-17 09:57:52,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/368bb6db6/617e171b3376418f829742947c0bdf1a [2021-12-17 09:57:52,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:57:52,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:57:52,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:57:52,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:57:52,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:57:52,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@238c7cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52, skipping insertion in model container [2021-12-17 09:57:52,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:57:52,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:57:52,451 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/loop-crafted/simple_array_index_value_2.i[919,932] [2021-12-17 09:57:52,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:57:52,468 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:57:52,475 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/loop-crafted/simple_array_index_value_2.i[919,932] [2021-12-17 09:57:52,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:57:52,487 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:57:52,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52 WrapperNode [2021-12-17 09:57:52,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:57:52,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:57:52,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:57:52,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:57:52,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,506 INFO L137 Inliner]: procedures = 17, calls = 12, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2021-12-17 09:57:52,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:57:52,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:57:52,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:57:52,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:57:52,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:57:52,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:57:52,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:57:52,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:57:52,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (1/1) ... [2021-12-17 09:57:52,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:57:52,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:57:52,569 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 09:57:52,581 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 09:57:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:57:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:57:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 09:57:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 09:57:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:57:52,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:57:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 09:57:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 09:57:52,638 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:57:52,639 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:57:52,742 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:57:52,746 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:57:52,747 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 09:57:52,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:57:52 BoogieIcfgContainer [2021-12-17 09:57:52,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:57:52,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:57:52,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:57:52,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:57:52,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:57:52" (1/3) ... [2021-12-17 09:57:52,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775dd421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:57:52, skipping insertion in model container [2021-12-17 09:57:52,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:57:52" (2/3) ... [2021-12-17 09:57:52,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775dd421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:57:52, skipping insertion in model container [2021-12-17 09:57:52,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:57:52" (3/3) ... [2021-12-17 09:57:52,774 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2021-12-17 09:57:52,778 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:57:52,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:57:52,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:57:52,826 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 09:57:52,826 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:57:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 09:57:52,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:57:52,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:57:52,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:57:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:57:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1820178652, now seen corresponding path program 1 times [2021-12-17 09:57:52,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:57:52,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896230198] [2021-12-17 09:57:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:57:52,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:57:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:57:52,950 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 09:57:52,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:57:52,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896230198] [2021-12-17 09:57:52,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896230198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:57:52,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:57:52,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:57:52,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654691506] [2021-12-17 09:57:52,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:57:52,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:57:52,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:57:52,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:57:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:57:52,980 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:57:52,995 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-12-17 09:57:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:57:52,996 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 09:57:52,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:57:53,001 INFO L225 Difference]: With dead ends: 32 [2021-12-17 09:57:53,001 INFO L226 Difference]: Without dead ends: 13 [2021-12-17 09:57:53,003 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 09:57:53,007 INFO L933 BasicCegarLoop]: 18 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, 18 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 09:57:53,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:57:53,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-17 09:57:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-17 09:57:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-12-17 09:57:53,029 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 7 [2021-12-17 09:57:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:57:53,029 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-12-17 09:57:53,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-12-17 09:57:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-17 09:57:53,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:57:53,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:57:53,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:57:53,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:57:53,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:57:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1808172879, now seen corresponding path program 1 times [2021-12-17 09:57:53,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:57:53,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675605032] [2021-12-17 09:57:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:57:53,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:57:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:57:53,074 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 09:57:53,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:57:53,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675605032] [2021-12-17 09:57:53,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675605032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:57:53,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:57:53,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:57:53,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729329890] [2021-12-17 09:57:53,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:57:53,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:57:53,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:57:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:57:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:57:53,078 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:57:53,096 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-12-17 09:57:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:57:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-17 09:57:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:57:53,098 INFO L225 Difference]: With dead ends: 30 [2021-12-17 09:57:53,098 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 09:57:53,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:57:53,099 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:57:53,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:57:53,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 09:57:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-12-17 09:57:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-12-17 09:57:53,103 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2021-12-17 09:57:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:57:53,103 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-12-17 09:57:53,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:53,103 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-12-17 09:57:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 09:57:53,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:57:53,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:57:53,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:57:53,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:57:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:57:53,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1968450312, now seen corresponding path program 1 times [2021-12-17 09:57:53,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:57:53,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74192364] [2021-12-17 09:57:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:57:53,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:57:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:57:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:57:53,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:57:53,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74192364] [2021-12-17 09:57:53,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74192364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:57:53,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944875286] [2021-12-17 09:57:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:57:53,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:57:53,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:57:53,174 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 09:57:53,175 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 09:57:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:57:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 09:57:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:57:53,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 09:57:53,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-12-17 09:57:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:57:53,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:57:53,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-12-17 09:57:53,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:57:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-12-17 09:57:53,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-12-17 09:57:53,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-12-17 09:57:53,743 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-12-17 09:57:53,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 49 [2021-12-17 09:57:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:57:53,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944875286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:57:53,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:57:53,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 13 [2021-12-17 09:57:53,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872415157] [2021-12-17 09:57:53,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:57:53,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 09:57:53,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:57:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 09:57:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-17 09:57:53,945 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:57:54,086 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-12-17 09:57:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 09:57:54,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-17 09:57:54,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:57:54,087 INFO L225 Difference]: With dead ends: 40 [2021-12-17 09:57:54,088 INFO L226 Difference]: Without dead ends: 33 [2021-12-17 09:57:54,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-17 09:57:54,089 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:57:54,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 50 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:57:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-17 09:57:54,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-12-17 09:57:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-17 09:57:54,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2021-12-17 09:57:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:57:54,092 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-17 09:57:54,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-17 09:57:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 09:57:54,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:57:54,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:57:54,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:57:54,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:57:54,310 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:57:54,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:57:54,310 INFO L85 PathProgramCache]: Analyzing trace with hash -209237439, now seen corresponding path program 2 times [2021-12-17 09:57:54,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:57:54,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7927319] [2021-12-17 09:57:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:57:54,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:57:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:57:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:57:54,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:57:54,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7927319] [2021-12-17 09:57:54,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7927319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:57:54,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115089084] [2021-12-17 09:57:54,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:57:54,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:57:54,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:57:54,368 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 09:57:54,369 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 09:57:54,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:57:54,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:57:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-17 09:57:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:57:54,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 09:57:54,551 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-17 09:57:54,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2021-12-17 09:57:54,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2021-12-17 09:57:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:57:54,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:57:55,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-12-17 09:57:56,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:57:56,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-12-17 09:57:56,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-12-17 09:57:56,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-12-17 09:57:56,084 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-12-17 09:57:56,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 49 [2021-12-17 09:57:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:57:56,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115089084] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:57:56,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:57:56,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 10] total 18 [2021-12-17 09:57:56,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272517518] [2021-12-17 09:57:56,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:57:56,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 09:57:56,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:57:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 09:57:56,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-12-17 09:57:56,260 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:57:56,857 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-12-17 09:57:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 09:57:56,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 09:57:56,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:57:56,858 INFO L225 Difference]: With dead ends: 54 [2021-12-17 09:57:56,858 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 09:57:56,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 09:57:56,859 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:57:56,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 68 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:57:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 09:57:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2021-12-17 09:57:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-17 09:57:56,863 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2021-12-17 09:57:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:57:56,863 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-17 09:57:56,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:57:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-17 09:57:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 09:57:56,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:57:56,864 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:57:56,881 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 09:57:57,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 09:57:57,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:57:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:57:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash -549955312, now seen corresponding path program 1 times [2021-12-17 09:57:57,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:57:57,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56762085] [2021-12-17 09:57:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:57:57,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:57:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:57:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:57:57,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:57:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56762085] [2021-12-17 09:57:57,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56762085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:57:57,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141728713] [2021-12-17 09:57:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:57:57,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:57:57,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:57:57,170 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 09:57:57,171 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 09:57:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:57:57,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 09:57:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:57:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 52 [2021-12-17 09:57:57,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 55 [2021-12-17 09:57:57,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 11 [2021-12-17 09:57:57,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2021-12-17 09:57:57,854 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 09:57:57,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 37 [2021-12-17 09:57:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:57:57,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:57:59,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-12-17 09:57:59,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:57:59,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-12-17 09:57:59,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-12-17 09:57:59,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-12-17 09:57:59,942 INFO L354 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2021-12-17 09:57:59,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 39 [2021-12-17 09:58:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:58:00,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141728713] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:58:00,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:58:00,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 12] total 23 [2021-12-17 09:58:00,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513236780] [2021-12-17 09:58:00,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:58:00,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-17 09:58:00,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:58:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-17 09:58:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-12-17 09:58:00,143 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:58:00,415 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-12-17 09:58:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 09:58:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-17 09:58:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:58:00,417 INFO L225 Difference]: With dead ends: 44 [2021-12-17 09:58:00,417 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 09:58:00,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-12-17 09:58:00,418 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:58:00,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2021-12-17 09:58:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 09:58:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-17 09:58:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-17 09:58:00,421 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 23 [2021-12-17 09:58:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:58:00,422 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-17 09:58:00,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-17 09:58:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 09:58:00,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:58:00,422 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 09:58:00,456 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 09:58:00,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:00,631 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:58:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:58:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1289871521, now seen corresponding path program 2 times [2021-12-17 09:58:00,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:58:00,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687444860] [2021-12-17 09:58:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:58:00,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:58:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:58:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 09:58:00,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:58:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687444860] [2021-12-17 09:58:00,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687444860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:58:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479091368] [2021-12-17 09:58:00,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:58:00,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:00,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:58:00,772 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 09:58:00,780 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 09:58:00,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:58:00,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:58:00,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 09:58:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:58:00,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 52 [2021-12-17 09:58:00,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 55 [2021-12-17 09:58:00,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 09:58:00,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2021-12-17 09:58:02,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2021-12-17 09:58:02,490 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-17 09:58:02,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 37 [2021-12-17 09:58:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:58:02,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:58:13,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-12-17 09:58:13,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 09:58:13,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-12-17 09:58:13,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2021-12-17 09:58:13,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-12-17 09:58:13,990 INFO L354 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2021-12-17 09:58:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 39 [2021-12-17 09:58:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 09:58:14,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479091368] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:58:14,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:58:14,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 14] total 27 [2021-12-17 09:58:14,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790103450] [2021-12-17 09:58:14,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:58:14,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-17 09:58:14,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:58:14,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-17 09:58:14,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=594, Unknown=2, NotChecked=0, Total=702 [2021-12-17 09:58:14,198 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:58:16,744 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2021-12-17 09:58:16,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 09:58:16,744 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 09:58:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:58:16,744 INFO L225 Difference]: With dead ends: 56 [2021-12-17 09:58:16,745 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 09:58:16,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=175, Invalid=879, Unknown=2, NotChecked=0, Total=1056 [2021-12-17 09:58:16,746 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:58:16,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 133 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2021-12-17 09:58:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 09:58:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-12-17 09:58:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-12-17 09:58:16,752 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2021-12-17 09:58:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:58:16,752 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-12-17 09:58:16,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-12-17 09:58:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 09:58:16,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:58:16,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 09:58:16,774 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 09:58:16,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:16,972 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:58:16,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:58:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash -731259602, now seen corresponding path program 3 times [2021-12-17 09:58:16,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:58:16,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378642645] [2021-12-17 09:58:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:58:16,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:58:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:58:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 09:58:17,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:58:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378642645] [2021-12-17 09:58:17,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378642645] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:58:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188152775] [2021-12-17 09:58:17,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:58:17,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:58:17,089 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 09:58:17,090 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 09:58:17,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 09:58:17,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:58:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 09:58:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:58:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 09:58:17,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:58:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 09:58:17,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188152775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:58:17,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:58:17,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-17 09:58:17,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081028771] [2021-12-17 09:58:17,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:58:17,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 09:58:17,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:58:17,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 09:58:17,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-12-17 09:58:17,562 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:58:18,033 INFO L93 Difference]: Finished difference Result 136 states and 144 transitions. [2021-12-17 09:58:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 09:58:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-17 09:58:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:58:18,034 INFO L225 Difference]: With dead ends: 136 [2021-12-17 09:58:18,034 INFO L226 Difference]: Without dead ends: 119 [2021-12-17 09:58:18,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-12-17 09:58:18,035 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 210 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:58:18,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 185 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:58:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-17 09:58:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 68. [2021-12-17 09:58:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-17 09:58:18,042 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 39 [2021-12-17 09:58:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:58:18,043 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-17 09:58:18,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-17 09:58:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 09:58:18,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:58:18,044 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 09:58:18,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 09:58:18,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:18,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:58:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:58:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash 756890813, now seen corresponding path program 4 times [2021-12-17 09:58:18,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:58:18,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850460211] [2021-12-17 09:58:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:58:18,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:58:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:58:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 09:58:18,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:58:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850460211] [2021-12-17 09:58:18,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850460211] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:58:18,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127055076] [2021-12-17 09:58:18,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:58:18,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:58:18,504 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 09:58:18,505 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 09:58:18,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:58:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:58:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-17 09:58:18,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:58:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 09:58:18,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:58:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 09:58:19,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127055076] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:58:19,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:58:19,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2021-12-17 09:58:19,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356608392] [2021-12-17 09:58:19,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:58:19,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 09:58:19,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:58:19,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 09:58:19,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-12-17 09:58:19,192 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:58:26,357 INFO L93 Difference]: Finished difference Result 276 states and 291 transitions. [2021-12-17 09:58:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 09:58:26,357 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-17 09:58:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:58:26,359 INFO L225 Difference]: With dead ends: 276 [2021-12-17 09:58:26,359 INFO L226 Difference]: Without dead ends: 259 [2021-12-17 09:58:26,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=598, Invalid=1042, Unknown=0, NotChecked=0, Total=1640 [2021-12-17 09:58:26,360 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1104 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 09:58:26,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 850 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 09:58:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-17 09:58:26,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 124. [2021-12-17 09:58:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:26,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2021-12-17 09:58:26,370 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 67 [2021-12-17 09:58:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:58:26,370 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2021-12-17 09:58:26,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.793103448275862) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:58:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2021-12-17 09:58:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-17 09:58:26,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:58:26,379 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 09:58:26,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 09:58:26,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:26,596 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:58:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:58:26,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1787287973, now seen corresponding path program 5 times [2021-12-17 09:58:26,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:58:26,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499848385] [2021-12-17 09:58:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:58:26,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:58:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:58:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 09:58:27,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:58:27,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499848385] [2021-12-17 09:58:27,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499848385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:58:27,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841197856] [2021-12-17 09:58:27,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 09:58:27,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:58:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:58:27,265 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 09:58:27,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15