./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-crafted/zero_sum_const2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:02:06,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:02:06,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:02:06,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:02:06,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:02:06,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:02:06,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:02:06,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:02:06,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:02:06,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:02:06,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:02:06,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:02:06,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:02:06,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:02:06,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:02:06,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:02:06,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:02:06,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:02:06,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:02:06,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:02:06,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:02:06,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:02:06,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:02:06,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:02:06,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:02:06,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:02:06,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:02:06,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:02:06,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:02:06,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:02:06,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:02:06,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:02:06,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:02:06,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:02:06,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:02:06,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:02:06,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:02:06,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:02:06,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:02:06,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:02:06,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:02:06,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:02:06,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:02:06,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:02:06,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:02:06,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:02:06,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:02:06,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:02:06,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:02:06,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:02:06,744 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:02:06,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:02:06,745 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:02:06,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:02:06,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:02:06,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:02:06,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:02:06,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:02:06,746 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:02:06,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:02:06,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:02:06,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:02:06,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:02:06,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:02:06,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:02:06,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:02:06,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:02:06,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:02:06,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:02:06,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:02:06,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:02:06,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:02:06,749 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:02:06,749 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:02:06,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:02:06,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:02:06,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2021-12-21 10:02:06,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:02:07,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:02:07,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:02:07,014 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:02:07,015 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:02:07,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2021-12-21 10:02:07,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f70e947/f54447db614e417f8b7529bac1ee8f93/FLAG90610fbef [2021-12-21 10:02:07,508 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:02:07,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2021-12-21 10:02:07,516 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f70e947/f54447db614e417f8b7529bac1ee8f93/FLAG90610fbef [2021-12-21 10:02:07,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f70e947/f54447db614e417f8b7529bac1ee8f93 [2021-12-21 10:02:07,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:02:07,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:02:07,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:02:07,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:02:07,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:02:07,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:02:07" (1/1) ... [2021-12-21 10:02:07,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37be95d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:07, skipping insertion in model container [2021-12-21 10:02:07,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:02:07" (1/1) ... [2021-12-21 10:02:07,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:02:07,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:02:08,121 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2021-12-21 10:02:08,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:02:08,161 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:02:08,176 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c[406,419] [2021-12-21 10:02:08,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:02:08,208 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:02:08,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08 WrapperNode [2021-12-21 10:02:08,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:02:08,210 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:02:08,210 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:02:08,210 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:02:08,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,245 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-21 10:02:08,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:02:08,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:02:08,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:02:08,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:02:08,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:02:08,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:02:08,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:02:08,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:02:08,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (1/1) ... [2021-12-21 10:02:08,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:02:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:08,325 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:02:08,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:02:08,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:02:08,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:02:08,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:02:08,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:02:08,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:02:08,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:02:08,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:02:08,421 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:02:08,423 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:02:08,547 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:02:08,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:02:08,554 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-21 10:02:08,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:02:08 BoogieIcfgContainer [2021-12-21 10:02:08,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:02:08,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:02:08,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:02:08,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:02:08,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:02:07" (1/3) ... [2021-12-21 10:02:08,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f48f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:02:08, skipping insertion in model container [2021-12-21 10:02:08,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:02:08" (2/3) ... [2021-12-21 10:02:08,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71f48f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:02:08, skipping insertion in model container [2021-12-21 10:02:08,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:02:08" (3/3) ... [2021-12-21 10:02:08,576 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2021-12-21 10:02:08,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:02:08,581 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:02:08,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:02:08,627 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:02:08,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:02:08,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:02:08,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:08,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:08,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:08,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-12-21 10:02:08,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:08,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668300493] [2021-12-21 10:02:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:08,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:08,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:08,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668300493] [2021-12-21 10:02:08,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668300493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:02:08,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:02:08,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:02:08,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408592174] [2021-12-21 10:02:08,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:02:08,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:02:08,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:08,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:02:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:02:08,892 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 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 7.5) internal successors, (15), 2 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) [2021-12-21 10:02:08,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:08,910 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-12-21 10:02:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:02:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) Word has length 15 [2021-12-21 10:02:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:08,920 INFO L225 Difference]: With dead ends: 47 [2021-12-21 10:02:08,920 INFO L226 Difference]: Without dead ends: 21 [2021-12-21 10:02:08,923 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 [2021-12-21 10:02:08,927 INFO L933 BasicCegarLoop]: 31 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, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:08,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:02:08,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-21 10:02:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-21 10:02:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 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) [2021-12-21 10:02:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-21 10:02:08,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-12-21 10:02:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:08,970 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-21 10:02:08,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-12-21 10:02:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-21 10:02:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 10:02:08,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:08,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:08,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:02:08,974 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-12-21 10:02:08,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:08,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033803708] [2021-12-21 10:02:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:08,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:09,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:09,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033803708] [2021-12-21 10:02:09,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033803708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:02:09,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:02:09,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:02:09,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221364775] [2021-12-21 10:02:09,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:02:09,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:02:09,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:02:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:02:09,070 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-12-21 10:02:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:09,107 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-21 10:02:09,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:02:09,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) Word has length 15 [2021-12-21 10:02:09,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:09,108 INFO L225 Difference]: With dead ends: 39 [2021-12-21 10:02:09,109 INFO L226 Difference]: Without dead ends: 23 [2021-12-21 10:02:09,109 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 [2021-12-21 10:02:09,110 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:09,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:02:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-21 10:02:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-21 10:02:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-21 10:02:09,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-12-21 10:02:09,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:09,116 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-21 10:02:09,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-12-21 10:02:09,117 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-21 10:02:09,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 10:02:09,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:09,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:09,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:02:09,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-12-21 10:02:09,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:09,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023390904] [2021-12-21 10:02:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:09,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:02:09,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:09,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023390904] [2021-12-21 10:02:09,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023390904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:02:09,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:02:09,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:02:09,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324550713] [2021-12-21 10:02:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:02:09,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:02:09,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:02:09,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:02:09,215 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:09,317 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-12-21 10:02:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:02:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-12-21 10:02:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:09,318 INFO L225 Difference]: With dead ends: 44 [2021-12-21 10:02:09,318 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 10:02:09,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:02:09,320 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:09,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:02:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 10:02:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-21 10:02:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-21 10:02:09,326 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-21 10:02:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:09,327 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-21 10:02:09,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-21 10:02:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 10:02:09,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:09,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:09,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:02:09,328 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:09,329 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-12-21 10:02:09,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:09,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466276555] [2021-12-21 10:02:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:09,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:02:09,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466276555] [2021-12-21 10:02:09,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466276555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:09,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101917770] [2021-12-21 10:02:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:09,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:09,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:09,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:02:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:09,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:02:09,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:02:09,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:02:09,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101917770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:09,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:09,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 10:02:09,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308577160] [2021-12-21 10:02:09,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:09,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 10:02:09,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 10:02:09,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:02:09,668 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:09,742 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-21 10:02:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 10:02:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-21 10:02:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:09,744 INFO L225 Difference]: With dead ends: 49 [2021-12-21 10:02:09,744 INFO L226 Difference]: Without dead ends: 29 [2021-12-21 10:02:09,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:02:09,755 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:09,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:02:09,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-21 10:02:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-21 10:02:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-21 10:02:09,769 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-12-21 10:02:09,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:09,770 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-21 10:02:09,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-21 10:02:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:02:09,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:09,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:09,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 10:02:09,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:09,988 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:09,989 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-12-21 10:02:09,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:09,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113477096] [2021-12-21 10:02:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:09,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:02:10,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:10,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113477096] [2021-12-21 10:02:10,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113477096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:10,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560947322] [2021-12-21 10:02:10,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:02:10,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:10,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:10,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:10,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:02:10,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:02:10,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:10,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:02:10,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:02:10,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-21 10:02:10,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560947322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:10,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:10,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-21 10:02:10,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215333668] [2021-12-21 10:02:10,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:10,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 10:02:10,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 10:02:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:02:10,394 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) [2021-12-21 10:02:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:10,486 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-21 10:02:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 10:02:10,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) Word has length 27 [2021-12-21 10:02:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:10,489 INFO L225 Difference]: With dead ends: 57 [2021-12-21 10:02:10,489 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 10:02:10,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-21 10:02:10,491 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:10,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:02:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 10:02:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-12-21 10:02:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-21 10:02:10,505 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-12-21 10:02:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:10,505 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-21 10:02:10,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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) [2021-12-21 10:02:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-21 10:02:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 10:02:10,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:10,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:10,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:10,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-12-21 10:02:10,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:10,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396862602] [2021-12-21 10:02:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:10,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:11,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:11,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396862602] [2021-12-21 10:02:11,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396862602] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428335689] [2021-12-21 10:02:11,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:02:11,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:11,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:11,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:11,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:02:11,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:02:11,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:11,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-21 10:02:11,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:12,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:02:12,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2021-12-21 10:02:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:12,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:16,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:02:16,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 103 [2021-12-21 10:02:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:17,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428335689] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:17,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:17,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 24] total 55 [2021-12-21 10:02:17,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441388611] [2021-12-21 10:02:17,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:17,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-21 10:02:17,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-21 10:02:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2671, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 10:02:17,826 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 55 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:20,395 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-12-21 10:02:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-21 10:02:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 55 states have internal predecessors, (97), 0 states have call successors, (0), 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 35 [2021-12-21 10:02:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:20,398 INFO L225 Difference]: With dead ends: 89 [2021-12-21 10:02:20,398 INFO L226 Difference]: Without dead ends: 83 [2021-12-21 10:02:20,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 35 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=906, Invalid=8214, Unknown=0, NotChecked=0, Total=9120 [2021-12-21 10:02:20,402 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:20,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 72 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 361 Invalid, 0 Unknown, 495 Unchecked, 0.3s Time] [2021-12-21 10:02:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-21 10:02:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 53. [2021-12-21 10:02:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-21 10:02:20,411 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2021-12-21 10:02:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:20,412 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-21 10:02:20,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 55 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-21 10:02:20,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 10:02:20,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:20,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:20,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:20,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:20,627 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-12-21 10:02:20,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:20,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965376814] [2021-12-21 10:02:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:20,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:02:20,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965376814] [2021-12-21 10:02:20,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965376814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:20,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705972617] [2021-12-21 10:02:20,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:02:20,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:20,712 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:20,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:02:20,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:02:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:02:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:02:20,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:02:20,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705972617] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:20,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:20,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:02:20,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099194173] [2021-12-21 10:02:20,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:20,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:02:20,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:20,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:02:20,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:02:20,937 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:21,110 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-12-21 10:02:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:02:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-21 10:02:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:21,118 INFO L225 Difference]: With dead ends: 121 [2021-12-21 10:02:21,120 INFO L226 Difference]: Without dead ends: 72 [2021-12-21 10:02:21,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:02:21,121 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:21,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:02:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-21 10:02:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-12-21 10:02:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-12-21 10:02:21,131 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2021-12-21 10:02:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:21,133 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-12-21 10:02:21,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-12-21 10:02:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 10:02:21,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:21,138 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:21,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:21,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:21,359 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:21,360 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2021-12-21 10:02:21,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:21,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131323788] [2021-12-21 10:02:21,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:21,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:02:21,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131323788] [2021-12-21 10:02:21,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131323788] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:21,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471443396] [2021-12-21 10:02:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:02:21,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:21,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:21,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:02:21,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 10:02:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:21,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:02:21,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:02:21,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:02:21,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471443396] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:21,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:21,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:02:21,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580390761] [2021-12-21 10:02:21,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:21,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:02:21,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:02:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:02:21,693 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) [2021-12-21 10:02:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:21,870 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-12-21 10:02:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 10:02:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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 [2021-12-21 10:02:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:21,871 INFO L225 Difference]: With dead ends: 66 [2021-12-21 10:02:21,871 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 10:02:21,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:02:21,872 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:21,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 31 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:02:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 10:02:21,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-21 10:02:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-21 10:02:21,878 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-12-21 10:02:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:21,878 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-21 10:02:21,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 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) [2021-12-21 10:02:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-21 10:02:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:02:21,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:21,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:21,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:22,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:22,092 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-12-21 10:02:22,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:22,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253670181] [2021-12-21 10:02:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:22,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:23,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253670181] [2021-12-21 10:02:23,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253670181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466150498] [2021-12-21 10:02:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:02:23,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:23,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:23,768 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:23,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:02:23,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-21 10:02:23,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:23,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-21 10:02:23,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:24,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2021-12-21 10:02:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:02:24,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:25,721 INFO L353 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-21 10:02:25,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2021-12-21 10:02:26,012 INFO L353 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-12-21 10:02:26,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2021-12-21 10:02:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:02:26,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466150498] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:26,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:26,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 17, 16] total 62 [2021-12-21 10:02:26,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129136326] [2021-12-21 10:02:26,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:26,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-21 10:02:26,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:26,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-21 10:02:26,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3554, Unknown=0, NotChecked=0, Total=3782 [2021-12-21 10:02:26,101 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:29,339 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-21 10:02:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-21 10:02:29,339 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 states have internal predecessors, (116), 0 states have call successors, (0), 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 45 [2021-12-21 10:02:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:29,340 INFO L225 Difference]: With dead ends: 80 [2021-12-21 10:02:29,340 INFO L226 Difference]: Without dead ends: 76 [2021-12-21 10:02:29,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2021-12-21 10:02:29,344 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:29,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:02:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-21 10:02:29,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-12-21 10:02:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-21 10:02:29,362 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-12-21 10:02:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:29,362 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-21 10:02:29,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-21 10:02:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 10:02:29,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:29,363 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:29,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:29,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:29,564 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-12-21 10:02:29,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:29,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093905888] [2021-12-21 10:02:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:29,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 10:02:29,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093905888] [2021-12-21 10:02:29,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093905888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:29,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789351317] [2021-12-21 10:02:29,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 10:02:29,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:29,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:29,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:29,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:02:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:02:29,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 10:02:29,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 10:02:29,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789351317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:29,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:29,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 10:02:29,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23646484] [2021-12-21 10:02:29,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:29,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:02:29,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:29,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:02:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:02:29,969 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:30,170 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-12-21 10:02:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:02:30,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-21 10:02:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:30,171 INFO L225 Difference]: With dead ends: 149 [2021-12-21 10:02:30,171 INFO L226 Difference]: Without dead ends: 86 [2021-12-21 10:02:30,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-21 10:02:30,171 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:30,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 36 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:02:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-21 10:02:30,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2021-12-21 10:02:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-12-21 10:02:30,180 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2021-12-21 10:02:30,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:30,180 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-12-21 10:02:30,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-12-21 10:02:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 10:02:30,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:30,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:30,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:30,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:30,392 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:30,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2021-12-21 10:02:30,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:30,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892464563] [2021-12-21 10:02:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:30,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 10:02:30,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:30,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892464563] [2021-12-21 10:02:30,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892464563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:30,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647764361] [2021-12-21 10:02:30,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:02:30,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:30,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:30,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:30,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:02:30,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:02:30,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:30,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 10:02:30,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 10:02:30,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 10:02:30,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647764361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:30,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:30,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-21 10:02:30,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828521295] [2021-12-21 10:02:30,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:30,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 10:02:30,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 10:02:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:02:30,751 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:30,987 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-12-21 10:02:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 10:02:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-21 10:02:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:30,989 INFO L225 Difference]: With dead ends: 80 [2021-12-21 10:02:30,989 INFO L226 Difference]: Without dead ends: 60 [2021-12-21 10:02:30,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-21 10:02:30,990 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 108 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:30,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:02:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-21 10:02:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-21 10:02:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-21 10:02:30,996 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-12-21 10:02:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-21 10:02:30,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-21 10:02:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 10:02:30,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:30,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:31,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:31,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 10:02:31,198 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:31,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-12-21 10:02:31,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434897378] [2021-12-21 10:02:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:31,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:33,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434897378] [2021-12-21 10:02:33,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434897378] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:33,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673741505] [2021-12-21 10:02:33,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:02:33,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:33,647 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:33,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:02:33,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-21 10:02:33,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:33,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-21 10:02:33,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:33,789 INFO L387 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 [2021-12-21 10:02:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:02:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:02:37,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:02:37,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:02:37,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 145 [2021-12-21 10:02:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:02:38,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:02:42,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673741505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:42,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:42,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 26, 21] total 86 [2021-12-21 10:02:42,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540663393] [2021-12-21 10:02:42,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:42,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-21 10:02:42,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:42,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-21 10:02:42,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=6763, Unknown=1, NotChecked=0, Total=7310 [2021-12-21 10:02:42,481 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:47,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:47,090 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-12-21 10:02:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-21 10:02:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-21 10:02:47,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:47,091 INFO L225 Difference]: With dead ends: 98 [2021-12-21 10:02:47,091 INFO L226 Difference]: Without dead ends: 94 [2021-12-21 10:02:47,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 60 SyntacticMatches, 13 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5421 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1365, Invalid=17540, Unknown=1, NotChecked=0, Total=18906 [2021-12-21 10:02:47,095 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:47,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 141 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 964 Invalid, 0 Unknown, 579 Unchecked, 0.5s Time] [2021-12-21 10:02:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-21 10:02:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-12-21 10:02:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-12-21 10:02:47,105 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2021-12-21 10:02:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:47,105 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-12-21 10:02:47,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-12-21 10:02:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 10:02:47,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:47,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:47,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:47,311 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:47,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2021-12-21 10:02:47,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:47,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217912331] [2021-12-21 10:02:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:47,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 10:02:47,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:47,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217912331] [2021-12-21 10:02:47,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217912331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:47,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531944319] [2021-12-21 10:02:47,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:02:47,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:47,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:47,403 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:47,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 10:02:47,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:02:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:47,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 10:02:47,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 10:02:47,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 10:02:47,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531944319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:47,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:47,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-21 10:02:47,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892909128] [2021-12-21 10:02:47,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:47,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 10:02:47,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 10:02:47,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:02:47,722 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:47,959 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2021-12-21 10:02:47,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 10:02:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-21 10:02:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:47,965 INFO L225 Difference]: With dead ends: 177 [2021-12-21 10:02:47,965 INFO L226 Difference]: Without dead ends: 100 [2021-12-21 10:02:47,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-21 10:02:47,966 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:47,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 42 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:02:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-21 10:02:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-12-21 10:02:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-12-21 10:02:47,975 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2021-12-21 10:02:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:47,975 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-12-21 10:02:47,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-12-21 10:02:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 10:02:47,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:47,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:47,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:48,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 10:02:48,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2021-12-21 10:02:48,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:48,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807645776] [2021-12-21 10:02:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:48,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 10:02:48,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807645776] [2021-12-21 10:02:48,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807645776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:48,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532073300] [2021-12-21 10:02:48,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:02:48,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:48,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:48,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 10:02:48,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 10:02:48,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:48,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 10:02:48,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 10:02:48,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:02:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 10:02:48,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532073300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:02:48,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:02:48,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-21 10:02:48,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423490829] [2021-12-21 10:02:48,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:02:48,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 10:02:48,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:02:48,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 10:02:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:02:48,620 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:02:48,852 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-12-21 10:02:48,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 10:02:48,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-21 10:02:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:02:48,853 INFO L225 Difference]: With dead ends: 94 [2021-12-21 10:02:48,853 INFO L226 Difference]: Without dead ends: 70 [2021-12-21 10:02:48,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-12-21 10:02:48,854 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:02:48,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 29 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 10:02:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-21 10:02:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-21 10:02:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-21 10:02:48,861 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-12-21 10:02:48,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:02:48,861 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-21 10:02:48,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:02:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-21 10:02:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 10:02:48,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:02:48,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:02:48,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 10:02:49,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 10:02:49,063 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:02:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:02:49,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2021-12-21 10:02:49,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:02:49,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701988911] [2021-12-21 10:02:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:02:49,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:02:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:02:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:02:52,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:02:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701988911] [2021-12-21 10:02:52,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701988911] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:02:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797246156] [2021-12-21 10:02:52,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:02:52,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:02:52,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:02:52,259 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:02:52,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 10:02:52,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-21 10:02:52,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:02:52,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-21 10:02:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:02:54,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:02:54,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 41 [2021-12-21 10:02:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 121 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:02:55,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:03:01,341 INFO L353 Elim1Store]: treesize reduction 387, result has 41.2 percent of original size [2021-12-21 10:03:01,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 176 treesize of output 301 [2021-12-21 10:03:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 10:03:02,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797246156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:03:02,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:03:02,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 32, 26] total 106 [2021-12-21 10:03:02,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53241166] [2021-12-21 10:03:02,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:03:02,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-12-21 10:03:02,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:03:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-12-21 10:03:02,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=10520, Unknown=0, NotChecked=0, Total=11130 [2021-12-21 10:03:02,499 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 106 states, 106 states have (on average 1.679245283018868) internal successors, (178), 106 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)