./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test25-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/ldv-regression/test25-1.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 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:10:34,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:10:34,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:10:34,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:10:34,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:10:34,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:10:34,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:10:34,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:10:34,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:10:34,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:10:34,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:10:34,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:10:34,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:10:34,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:10:34,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:10:34,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:10:34,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:10:34,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:10:34,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:10:34,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:10:34,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:10:34,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:10:34,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:10:34,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:10:34,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:10:34,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:10:34,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:10:34,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:10:34,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:10:34,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:10:34,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:10:34,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:10:34,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:10:34,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:10:34,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:10:34,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:10:34,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:10:34,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:10:34,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:10:34,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:10:34,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:10:34,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:10:34,156 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:10:34,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:10:34,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:10:34,157 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:10:34,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:10:34,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:10:34,159 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:10:34,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:10:34,159 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:10:34,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:10:34,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:10:34,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:10:34,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:10:34,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:10:34,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:10:34,160 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:10:34,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:10:34,161 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:10:34,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:10:34,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:10:34,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:10:34,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:10:34,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:10:34,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:10:34,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:10:34,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:10:34,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:10:34,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:10:34,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:10:34,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:10:34,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bbcfbf2e3b0e2934a6862bf6d7296c52dc11f31 [2021-08-26 02:10:34,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:10:34,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:10:34,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:10:34,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:10:34,497 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:10:34,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2021-08-26 02:10:34,556 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb338c07/43c4f12d3ace4dc596d6537727681813/FLAG2f2b31002 [2021-08-26 02:10:34,957 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:10:34,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2021-08-26 02:10:34,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb338c07/43c4f12d3ace4dc596d6537727681813/FLAG2f2b31002 [2021-08-26 02:10:35,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/beb338c07/43c4f12d3ace4dc596d6537727681813 [2021-08-26 02:10:35,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:10:35,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:10:35,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:10:35,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:10:35,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:10:35,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463c6809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35, skipping insertion in model container [2021-08-26 02:10:35,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:10:35,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:10:35,534 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2021-08-26 02:10:35,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:10:35,544 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:10:35,568 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c[936,949] [2021-08-26 02:10:35,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:10:35,619 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:10:35,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35 WrapperNode [2021-08-26 02:10:35,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:10:35,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:10:35,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:10:35,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:10:35,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:10:35,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:10:35,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:10:35,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:10:35,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:10:35,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:10:35,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:10:35,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:10:35,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (1/1) ... [2021-08-26 02:10:35,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:10:35,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:35,742 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) [2021-08-26 02:10:35,765 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 [2021-08-26 02:10:35,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:10:35,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:10:35,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:10:35,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:10:35,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:10:35,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:10:35,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:10:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:10:35,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:10:36,098 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:10:36,099 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 02:10:36,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:10:36 BoogieIcfgContainer [2021-08-26 02:10:36,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:10:36,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:10:36,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:10:36,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:10:36,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:10:35" (1/3) ... [2021-08-26 02:10:36,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597ea9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:10:36, skipping insertion in model container [2021-08-26 02:10:36,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:35" (2/3) ... [2021-08-26 02:10:36,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@597ea9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:10:36, skipping insertion in model container [2021-08-26 02:10:36,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:10:36" (3/3) ... [2021-08-26 02:10:36,106 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2021-08-26 02:10:36,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:10:36,110 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:10:36,158 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:10:36,163 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 02:10:36,163 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:10:36,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:10:36,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:36,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:36,179 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2021-08-26 02:10:36,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:36,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991198769] [2021-08-26 02:10:36,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:36,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:36,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:36,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991198769] [2021-08-26 02:10:36,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991198769] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:10:36,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:10:36,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:10:36,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234002471] [2021-08-26 02:10:36,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:10:36,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:10:36,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:10:36,352 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:36,377 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2021-08-26 02:10:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:10:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-26 02:10:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:36,384 INFO L225 Difference]: With dead ends: 32 [2021-08-26 02:10:36,385 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 02:10:36,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:10:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 02:10:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-26 02:10:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-26 02:10:36,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2021-08-26 02:10:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:36,409 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-26 02:10:36,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-26 02:10:36,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 02:10:36,410 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:36,410 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:36,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:10:36,411 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2021-08-26 02:10:36,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:36,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730811461] [2021-08-26 02:10:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:36,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:36,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:36,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730811461] [2021-08-26 02:10:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730811461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:36,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590746058] [2021-08-26 02:10:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:36,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:36,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:36,485 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) [2021-08-26 02:10:36,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 02:10:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:10:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:36,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590746058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:36,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:36,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 02:10:36,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011008622] [2021-08-26 02:10:36,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:10:36,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:36,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:10:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:10:36,766 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:36,805 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-08-26 02:10:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 02:10:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 02:10:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:36,807 INFO L225 Difference]: With dead ends: 26 [2021-08-26 02:10:36,808 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 02:10:36,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:10:36,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 02:10:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-26 02:10:36,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-08-26 02:10:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-26 02:10:36,816 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-08-26 02:10:36,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:36,816 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-26 02:10:36,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-26 02:10:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 02:10:36,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:36,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:36,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:37,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:37,045 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:37,046 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2021-08-26 02:10:37,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:37,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547571024] [2021-08-26 02:10:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:37,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:37,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:37,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547571024] [2021-08-26 02:10:37,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547571024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:37,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034121764] [2021-08-26 02:10:37,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:10:37,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:37,152 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) [2021-08-26 02:10:37,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 02:10:37,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 02:10:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 02:10:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:37,532 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-26 02:10:37,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2021-08-26 02:10:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 02:10:37,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034121764] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:10:37,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:10:37,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-08-26 02:10:37,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505399187] [2021-08-26 02:10:37,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:10:37,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:10:37,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-26 02:10:37,590 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:37,661 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-08-26 02:10:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:10:37,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-08-26 02:10:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:37,662 INFO L225 Difference]: With dead ends: 23 [2021-08-26 02:10:37,662 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 02:10:37,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-26 02:10:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 02:10:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-26 02:10:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-26 02:10:37,666 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-08-26 02:10:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:37,666 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-26 02:10:37,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-26 02:10:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 02:10:37,667 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:37,667 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:37,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:37,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 02:10:37,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1859304665, now seen corresponding path program 1 times [2021-08-26 02:10:37,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:37,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7442874] [2021-08-26 02:10:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:37,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:10:37,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:37,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7442874] [2021-08-26 02:10:37,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7442874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:37,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220902920] [2021-08-26 02:10:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:37,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:37,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:37,995 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) [2021-08-26 02:10:37,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 02:10:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:38,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 02:10:38,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:10:38,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220902920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:38,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:38,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 02:10:38,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475235390] [2021-08-26 02:10:38,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 02:10:38,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 02:10:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:10:38,230 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:38,261 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-08-26 02:10:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:10:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 02:10:38,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:38,263 INFO L225 Difference]: With dead ends: 32 [2021-08-26 02:10:38,263 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 02:10:38,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 02:10:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 02:10:38,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-08-26 02:10:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-26 02:10:38,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-08-26 02:10:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:38,277 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-26 02:10:38,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-26 02:10:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 02:10:38,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:38,278 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:38,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:38,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:38,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:38,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:38,498 INFO L82 PathProgramCache]: Analyzing trace with hash 291228695, now seen corresponding path program 2 times [2021-08-26 02:10:38,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:38,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964927685] [2021-08-26 02:10:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:38,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:10:38,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:38,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964927685] [2021-08-26 02:10:38,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964927685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:38,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844928777] [2021-08-26 02:10:38,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:10:38,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:38,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:38,594 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) [2021-08-26 02:10:38,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 02:10:38,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:10:38,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 02:10:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:10:38,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844928777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:38,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:38,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-26 02:10:38,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162053563] [2021-08-26 02:10:38,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:10:38,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:38,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:10:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:10:38,776 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:38,805 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-08-26 02:10:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 02:10:38,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 02:10:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:38,807 INFO L225 Difference]: With dead ends: 34 [2021-08-26 02:10:38,807 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 02:10:38,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:10:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 02:10:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-08-26 02:10:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-26 02:10:38,815 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-08-26 02:10:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:38,815 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-26 02:10:38,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-26 02:10:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 02:10:38,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:38,816 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:38,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:39,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:39,037 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 903742421, now seen corresponding path program 3 times [2021-08-26 02:10:39,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:39,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147475356] [2021-08-26 02:10:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:39,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 02:10:39,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:39,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147475356] [2021-08-26 02:10:39,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147475356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:39,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681967562] [2021-08-26 02:10:39,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:10:39,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:39,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:39,143 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) [2021-08-26 02:10:39,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 02:10:39,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 02:10:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 02:10:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:39,420 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-26 02:10:39,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2021-08-26 02:10:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-26 02:10:39,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681967562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:39,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:39,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-26 02:10:39,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325440413] [2021-08-26 02:10:39,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:10:39,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:10:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:10:39,450 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-08-26 02:10:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:39,563 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-08-26 02:10:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:10:39,564 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) Word has length 21 [2021-08-26 02:10:39,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:39,564 INFO L225 Difference]: With dead ends: 38 [2021-08-26 02:10:39,564 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 02:10:39,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:10:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 02:10:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-08-26 02:10:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-26 02:10:39,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2021-08-26 02:10:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-26 02:10:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2021-08-26 02:10:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-26 02:10:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:10:39,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:39,569 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:39,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:39,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:39,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:39,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1251069224, now seen corresponding path program 4 times [2021-08-26 02:10:39,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:39,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946475532] [2021-08-26 02:10:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:39,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 02:10:39,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:39,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946475532] [2021-08-26 02:10:39,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946475532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:39,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76501620] [2021-08-26 02:10:39,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:10:39,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:39,896 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) [2021-08-26 02:10:39,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 02:10:39,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:10:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:39,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 02:10:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:40,160 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-26 02:10:40,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2021-08-26 02:10:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 02:10:40,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76501620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:40,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:40,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-26 02:10:40,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279558997] [2021-08-26 02:10:40,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 02:10:40,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 02:10:40,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:10:40,198 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:40,326 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-08-26 02:10:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 02:10:40,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-08-26 02:10:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:40,327 INFO L225 Difference]: With dead ends: 44 [2021-08-26 02:10:40,327 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 02:10:40,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:10:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 02:10:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-08-26 02:10:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-26 02:10:40,330 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2021-08-26 02:10:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:40,331 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-26 02:10:40,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-26 02:10:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 02:10:40,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:40,332 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:40,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:40,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:40,537 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:40,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1378869733, now seen corresponding path program 5 times [2021-08-26 02:10:40,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:40,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578470033] [2021-08-26 02:10:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:40,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 02:10:40,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:40,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578470033] [2021-08-26 02:10:40,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578470033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:40,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417891753] [2021-08-26 02:10:40,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:10:40,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:40,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:40,621 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) [2021-08-26 02:10:40,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 02:10:42,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-26 02:10:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 02:10:42,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 02:10:42,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417891753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:42,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:42,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-26 02:10:42,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279403923] [2021-08-26 02:10:42,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 02:10:42,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 02:10:42,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:10:42,666 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:42,695 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-08-26 02:10:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 02:10:42,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 02:10:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:42,697 INFO L225 Difference]: With dead ends: 48 [2021-08-26 02:10:42,697 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 02:10:42,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 02:10:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 02:10:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-08-26 02:10:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-08-26 02:10:42,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2021-08-26 02:10:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:42,701 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-08-26 02:10:42,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-08-26 02:10:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 02:10:42,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:42,702 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:42,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:42,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:42,905 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:42,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1005994073, now seen corresponding path program 6 times [2021-08-26 02:10:42,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:42,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29093073] [2021-08-26 02:10:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:42,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 02:10:43,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:43,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29093073] [2021-08-26 02:10:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29093073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:43,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767645643] [2021-08-26 02:10:43,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:10:43,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:43,006 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) [2021-08-26 02:10:43,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:10:44,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 02:10:44,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 02:10:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:44,645 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-26 02:10:44,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2021-08-26 02:10:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-26 02:10:44,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767645643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:44,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:44,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-26 02:10:44,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000302430] [2021-08-26 02:10:44,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 02:10:44,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 02:10:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:10:44,679 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2021-08-26 02:10:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:44,875 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-08-26 02:10:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 02:10:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) Word has length 31 [2021-08-26 02:10:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:44,876 INFO L225 Difference]: With dead ends: 52 [2021-08-26 02:10:44,877 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 02:10:44,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-08-26 02:10:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 02:10:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-08-26 02:10:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 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) [2021-08-26 02:10:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-26 02:10:44,881 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2021-08-26 02:10:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:44,881 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-26 02:10:44,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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) [2021-08-26 02:10:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-26 02:10:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 02:10:44,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:44,882 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:44,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:45,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-08-26 02:10:45,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1595148508, now seen corresponding path program 7 times [2021-08-26 02:10:45,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:45,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521306497] [2021-08-26 02:10:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:45,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-26 02:10:45,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:45,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521306497] [2021-08-26 02:10:45,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521306497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:45,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348101315] [2021-08-26 02:10:45,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 02:10:45,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:45,253 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) [2021-08-26 02:10:45,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 02:10:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:45,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 02:10:45,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-26 02:10:45,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348101315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:45,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:45,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-26 02:10:45,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771782546] [2021-08-26 02:10:45,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 02:10:45,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:45,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 02:10:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 02:10:45,554 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:45,597 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-08-26 02:10:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:10:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-08-26 02:10:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:45,600 INFO L225 Difference]: With dead ends: 56 [2021-08-26 02:10:45,600 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 02:10:45,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 02:10:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 02:10:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-08-26 02:10:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-08-26 02:10:45,614 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2021-08-26 02:10:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:45,614 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-08-26 02:10:45,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-08-26 02:10:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 02:10:45,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:45,615 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:45,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:45,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-26 02:10:45,824 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:45,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:45,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1671756646, now seen corresponding path program 8 times [2021-08-26 02:10:45,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:45,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921110476] [2021-08-26 02:10:45,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:45,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-26 02:10:45,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:45,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921110476] [2021-08-26 02:10:45,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921110476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:45,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934927779] [2021-08-26 02:10:45,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:10:45,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:45,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:45,948 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) [2021-08-26 02:10:45,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 02:10:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:10:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:46,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 02:10:46,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-26 02:10:46,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934927779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:46,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:46,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-26 02:10:46,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170504489] [2021-08-26 02:10:46,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 02:10:46,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 02:10:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:10:46,244 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:46,282 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-08-26 02:10:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 02:10:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-26 02:10:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:46,284 INFO L225 Difference]: With dead ends: 57 [2021-08-26 02:10:46,284 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 02:10:46,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-26 02:10:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 02:10:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-26 02:10:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-08-26 02:10:46,288 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2021-08-26 02:10:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:46,288 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-08-26 02:10:46,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-08-26 02:10:46,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 02:10:46,289 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:46,289 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:46,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:46,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 02:10:46,501 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:46,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1546516264, now seen corresponding path program 9 times [2021-08-26 02:10:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:46,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996867116] [2021-08-26 02:10:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:46,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 20 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:10:49,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:49,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996867116] [2021-08-26 02:10:49,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996867116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:49,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850317567] [2021-08-26 02:10:49,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:10:49,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:49,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:49,245 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) [2021-08-26 02:10:49,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 02:10:49,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 02:10:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 02:10:49,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:49,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-26 02:10:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 02:10:49,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850317567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:49,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:49,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 21 [2021-08-26 02:10:49,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246932772] [2021-08-26 02:10:49,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:10:49,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:10:49,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:10:49,761 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:50,134 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-08-26 02:10:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:10:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-08-26 02:10:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:50,136 INFO L225 Difference]: With dead ends: 47 [2021-08-26 02:10:50,136 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 02:10:50,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:10:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 02:10:50,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-26 02:10:50,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 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) [2021-08-26 02:10:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-26 02:10:50,143 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2021-08-26 02:10:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:50,143 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-26 02:10:50,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-26 02:10:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 02:10:50,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:50,145 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:50,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:50,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-26 02:10:50,353 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1366350429, now seen corresponding path program 10 times [2021-08-26 02:10:50,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:50,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255694582] [2021-08-26 02:10:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:50,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:10:51,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:51,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255694582] [2021-08-26 02:10:51,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255694582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:51,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602512069] [2021-08-26 02:10:51,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:10:51,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:51,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:51,766 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) [2021-08-26 02:10:51,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 02:10:51,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:10:51,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:51,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 02:10:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:52,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-26 02:10:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 02:10:52,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602512069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:52,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:52,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 25 [2021-08-26 02:10:52,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771069833] [2021-08-26 02:10:52,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 02:10:52,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 02:10:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-08-26 02:10:52,185 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:52,828 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-26 02:10:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 02:10:52,829 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-26 02:10:52,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:52,829 INFO L225 Difference]: With dead ends: 51 [2021-08-26 02:10:52,829 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 02:10:52,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 771.3ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 02:10:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 02:10:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-26 02:10:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-08-26 02:10:52,834 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2021-08-26 02:10:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:52,834 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-08-26 02:10:52,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-08-26 02:10:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-26 02:10:52,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:52,835 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:52,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:53,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 02:10:53,035 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1237444007, now seen corresponding path program 11 times [2021-08-26 02:10:53,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:53,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704312728] [2021-08-26 02:10:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:53,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 12 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:10:54,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:54,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704312728] [2021-08-26 02:10:54,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704312728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:54,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047362104] [2021-08-26 02:10:54,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:10:54,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:54,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:54,177 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:10:54,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 02:12:27,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-26 02:12:27,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:12:27,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 02:12:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:12:28,193 INFO L354 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2021-08-26 02:12:28,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2021-08-26 02:12:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 02:12:28,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047362104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:12:28,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:12:28,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 40 [2021-08-26 02:12:28,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65648638] [2021-08-26 02:12:28,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-26 02:12:28,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:12:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-26 02:12:28,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 02:12:28,213 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:12:29,161 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-08-26 02:12:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 02:12:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2021-08-26 02:12:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:12:29,162 INFO L225 Difference]: With dead ends: 53 [2021-08-26 02:12:29,162 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 02:12:29,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1326.1ms TimeCoverageRelationStatistics Valid=529, Invalid=2777, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 02:12:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 02:12:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-26 02:12:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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) [2021-08-26 02:12:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-08-26 02:12:29,167 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2021-08-26 02:12:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:12:29,168 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-08-26 02:12:29,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-08-26 02:12:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 02:12:29,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:12:29,168 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:12:29,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 02:12:29,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 02:12:29,381 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:12:29,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:12:29,381 INFO L82 PathProgramCache]: Analyzing trace with hash 987545452, now seen corresponding path program 12 times [2021-08-26 02:12:29,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:12:29,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172675470] [2021-08-26 02:12:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:12:29,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:12:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:12:30,169 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 02:12:30,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:12:30,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172675470] [2021-08-26 02:12:30,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172675470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:12:30,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584076033] [2021-08-26 02:12:30,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:12:30,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:12:30,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:12:30,171 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:12:30,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 02:12:50,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-26 02:12:50,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:12:50,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 02:12:50,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:12:50,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-26 02:12:50,663 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-08-26 02:12:50,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-08-26 02:12:50,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 4 [2021-08-26 02:12:50,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-26 02:12:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-26 02:12:50,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584076033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:12:50,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:12:50,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 21 [2021-08-26 02:12:50,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14958129] [2021-08-26 02:12:50,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:12:50,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:12:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:12:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:12:50,837 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:12:51,376 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-08-26 02:12:51,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 02:12:51,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2021-08-26 02:12:51,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:12:51,378 INFO L225 Difference]: With dead ends: 55 [2021-08-26 02:12:51,378 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 02:12:51,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 02:12:51,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 02:12:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-26 02:12:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-08-26 02:12:51,384 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2021-08-26 02:12:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:12:51,384 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-08-26 02:12:51,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-08-26 02:12:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 02:12:51,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:12:51,386 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:12:51,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 02:12:51,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:12:51,586 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:12:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:12:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1353202673, now seen corresponding path program 13 times [2021-08-26 02:12:51,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:12:51,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559944514] [2021-08-26 02:12:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:12:51,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:12:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:12:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-26 02:12:52,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:12:52,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559944514] [2021-08-26 02:12:52,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559944514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:12:52,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227745877] [2021-08-26 02:12:52,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 02:12:52,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:12:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:12:52,383 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:12:52,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 02:12:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:12:52,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 02:12:52,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:12:53,460 INFO L354 Elim1Store]: treesize reduction 15, result has 16.7 percent of original size [2021-08-26 02:12:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 21 [2021-08-26 02:12:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 02:12:53,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227745877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:12:53,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:12:53,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 40 [2021-08-26 02:12:53,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022724914] [2021-08-26 02:12:53,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-26 02:12:53,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:12:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-26 02:12:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 02:12:53,476 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:54,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:12:54,278 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-08-26 02:12:54,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 02:12:54,279 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 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 [2021-08-26 02:12:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:12:54,279 INFO L225 Difference]: With dead ends: 57 [2021-08-26 02:12:54,279 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 02:12:54,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 1175.1ms TimeCoverageRelationStatistics Valid=723, Invalid=2937, Unknown=0, NotChecked=0, Total=3660 [2021-08-26 02:12:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 02:12:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-26 02:12:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-08-26 02:12:54,284 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2021-08-26 02:12:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:12:54,285 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-08-26 02:12:54,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:12:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-08-26 02:12:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-26 02:12:54,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:12:54,286 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:12:54,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 02:12:54,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 02:12:54,493 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:12:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:12:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash 562473782, now seen corresponding path program 14 times [2021-08-26 02:12:54,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:12:54,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268138542] [2021-08-26 02:12:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:12:54,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:12:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:12:54,549 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 02:12:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:12:54,634 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 02:12:54,634 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 02:12:54,635 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:12:54,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-26 02:12:54,642 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:12:54,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:12:54 BoogieIcfgContainer [2021-08-26 02:12:54,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:12:54,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:12:54,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:12:54,696 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:12:54,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:10:36" (3/4) ... [2021-08-26 02:12:54,698 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 02:12:54,740 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 02:12:54,741 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:12:54,741 INFO L168 Benchmark]: Toolchain (without parser) took 139363.19 ms. Allocated memory was 54.5 MB in the beginning and 251.7 MB in the end (delta: 197.1 MB). Free memory was 31.9 MB in the beginning and 130.0 MB in the end (delta: -98.1 MB). Peak memory consumption was 98.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:12:54,742 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 37.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:12:54,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.37 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.7 MB in the beginning and 51.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:12:54,742 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.88 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 49.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:12:54,742 INFO L168 Benchmark]: Boogie Preprocessor took 38.18 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 48.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:12:54,743 INFO L168 Benchmark]: RCFGBuilder took 385.76 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 47.5 MB in the end (delta: 884.1 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:12:54,743 INFO L168 Benchmark]: TraceAbstraction took 138594.41 ms. Allocated memory was 67.1 MB in the beginning and 251.7 MB in the end (delta: 184.5 MB). Free memory was 47.1 MB in the beginning and 135.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 95.7 MB. Max. memory is 16.1 GB. [2021-08-26 02:12:54,743 INFO L168 Benchmark]: Witness Printer took 44.75 ms. Allocated memory is still 251.7 MB. Free memory was 135.3 MB in the beginning and 130.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:12:54,745 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.1 MB in the end (delta: 37.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 251.37 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.7 MB in the beginning and 51.3 MB in the end (delta: -19.6 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.88 ms. Allocated memory is still 67.1 MB. Free memory was 51.3 MB in the beginning and 49.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.18 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 48.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 385.76 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 47.5 MB in the end (delta: 884.1 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 138594.41 ms. Allocated memory was 67.1 MB in the beginning and 251.7 MB in the end (delta: 184.5 MB). Free memory was 47.1 MB in the beginning and 135.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 95.7 MB. Max. memory is 16.1 GB. * Witness Printer took 44.75 ms. Allocated memory is still 251.7 MB. Free memory was 135.3 MB in the beginning and 130.0 MB in the end (delta: 5.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 47]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] COND TRUE !check(&cont, i) [L47] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 138484.6ms, OverallIterations: 17, TraceHistogramMax: 11, EmptinessCheckTime: 19.2ms, AutomataDifference: 4131.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 164 SDtfs, 176 SDslu, 578 SDs, 0 SdLazy, 2150 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1535.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 734 GetRequests, 426 SyntacticMatches, 3 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2741 ImplicationChecksByTransitivity, 5172.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=16, InterpolantAutomatonStates: 237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 91.3ms AutomataMinimizationTime, 16 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 289.7ms SsaConstructionTime, 117646.3ms SatisfiabilityAnalysisTime, 10948.5ms InterpolantComputationTime, 987 NumberOfCodeBlocks, 940 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 905 ConstructedInterpolants, 16 QuantifiedInterpolants, 6196 SizeOfPredicates, 98 NumberOfNonLiveVariables, 2406 ConjunctsInSsa, 233 ConjunctsInUnsatCore, 31 InterpolantComputations, 2 PerfectInterpolantSequences, 642/2266 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 02:12:54,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...