./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_k.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-new/count_by_k.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:06:20,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:06:20,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:06:20,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:06:20,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:06:20,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:06:20,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:06:20,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:06:20,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:06:20,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:06:20,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:06:20,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:06:20,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:06:20,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:06:20,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:06:20,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:06:20,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:06:20,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:06:20,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:06:20,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:06:20,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:06:20,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:06:21,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:06:21,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:06:21,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:06:21,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:06:21,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:06:21,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:06:21,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:06:21,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:06:21,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:06:21,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:06:21,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:06:21,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:06:21,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:06:21,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:06:21,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:06:21,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:06:21,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:06:21,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:06:21,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:06:21,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:06:21,075 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:06:21,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:06:21,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:06:21,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:06:21,093 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:06:21,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:06:21,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:06:21,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:06:21,094 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:06:21,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:06:21,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:06:21,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:06:21,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:06:21,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:06:21,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:06:21,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:06:21,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:06:21,096 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:06:21,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:06:21,097 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:06:21,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:06:21,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:06:21,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:06:21,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:06:21,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:06:21,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:06:21,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:06:21,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:06:21,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:06:21,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:06:21,100 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:06:21,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:06:21,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:06:21,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:06:21,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee41851a84d57c0c483c2a5edf48180b7c141c1991cdc82f0d66c6775eb49f5b [2021-12-16 00:06:21,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:06:21,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:06:21,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:06:21,498 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:06:21,499 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:06:21,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_k.i [2021-12-16 00:06:21,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44aa03b9/2acab8f5008b4cde8f129ef66b056454/FLAG0368c9c6c [2021-12-16 00:06:21,975 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:06:21,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i [2021-12-16 00:06:21,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44aa03b9/2acab8f5008b4cde8f129ef66b056454/FLAG0368c9c6c [2021-12-16 00:06:22,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a44aa03b9/2acab8f5008b4cde8f129ef66b056454 [2021-12-16 00:06:22,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:06:22,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:06:22,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:06:22,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:06:22,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:06:22,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da37177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22, skipping insertion in model container [2021-12-16 00:06:22,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:06:22,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:06:22,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2021-12-16 00:06:22,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:06:22,590 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:06:22,604 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_k.i[891,904] [2021-12-16 00:06:22,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:06:22,621 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:06:22,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22 WrapperNode [2021-12-16 00:06:22,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:06:22,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:06:22,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:06:22,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:06:22,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,639 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,662 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-12-16 00:06:22,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:06:22,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:06:22,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:06:22,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:06:22,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:06:22,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:06:22,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:06:22,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:06:22,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (1/1) ... [2021-12-16 00:06:22,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:06:22,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:06:22,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 00:06:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 00:06:22,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:06:22,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:06:22,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:06:22,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:06:22,791 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:06:22,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:06:22,871 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:06:22,876 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:06:22,877 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 00:06:22,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:06:22 BoogieIcfgContainer [2021-12-16 00:06:22,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:06:22,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:06:22,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:06:22,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:06:22,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:06:22" (1/3) ... [2021-12-16 00:06:22,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebee0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:06:22, skipping insertion in model container [2021-12-16 00:06:22,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:06:22" (2/3) ... [2021-12-16 00:06:22,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebee0f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:06:22, skipping insertion in model container [2021-12-16 00:06:22,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:06:22" (3/3) ... [2021-12-16 00:06:22,891 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2021-12-16 00:06:22,896 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:06:22,896 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:06:22,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:06:22,941 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 00:06:22,942 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:06:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) [2021-12-16 00:06:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 00:06:22,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:22,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:22,959 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:22,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1807120264, now seen corresponding path program 1 times [2021-12-16 00:06:22,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:22,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875007018] [2021-12-16 00:06:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:22,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:23,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:23,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875007018] [2021-12-16 00:06:23,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875007018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:06:23,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:06:23,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 00:06:23,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521847119] [2021-12-16 00:06:23,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:06:23,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:06:23,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:23,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:06:23,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:06:23,138 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:06:23,149 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-16 00:06:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:06:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 00:06:23,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:06:23,160 INFO L225 Difference]: With dead ends: 21 [2021-12-16 00:06:23,160 INFO L226 Difference]: Without dead ends: 9 [2021-12-16 00:06:23,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 00:06:23,168 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:06:23,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:06:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-16 00:06:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-16 00:06:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-12-16 00:06:23,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-12-16 00:06:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:06:23,202 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-12-16 00:06:23,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-12-16 00:06:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 00:06:23,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:23,204 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:23,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 00:06:23,206 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1806941518, now seen corresponding path program 1 times [2021-12-16 00:06:23,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:23,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328384445] [2021-12-16 00:06:23,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:23,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:23,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:23,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328384445] [2021-12-16 00:06:23,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328384445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:06:23,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:06:23,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 00:06:23,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101844042] [2021-12-16 00:06:23,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:06:23,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:06:23,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:06:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 00:06:23,474 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:06:23,537 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-12-16 00:06:23,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:06:23,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 00:06:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:06:23,538 INFO L225 Difference]: With dead ends: 15 [2021-12-16 00:06:23,538 INFO L226 Difference]: Without dead ends: 11 [2021-12-16 00:06:23,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-16 00:06:23,540 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:06:23,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:06:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-16 00:06:23,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-12-16 00:06:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2021-12-16 00:06:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-12-16 00:06:23,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-12-16 00:06:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:06:23,544 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-12-16 00:06:23,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-12-16 00:06:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 00:06:23,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:23,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:23,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 00:06:23,546 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1357243696, now seen corresponding path program 1 times [2021-12-16 00:06:23,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:23,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337385166] [2021-12-16 00:06:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:23,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:23,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:23,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337385166] [2021-12-16 00:06:23,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337385166] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:06:23,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596953615] [2021-12-16 00:06:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:23,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:06:23,658 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:06:23,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:06:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:23,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:06:23,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:06:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:23,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:06:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:24,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596953615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:06:24,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:06:24,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2021-12-16 00:06:24,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786631679] [2021-12-16 00:06:24,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:06:24,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 00:06:24,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:24,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 00:06:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:06:24,022 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:06:24,098 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-12-16 00:06:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:06:24,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 9 [2021-12-16 00:06:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:06:24,099 INFO L225 Difference]: With dead ends: 20 [2021-12-16 00:06:24,099 INFO L226 Difference]: Without dead ends: 16 [2021-12-16 00:06:24,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:06:24,101 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:06:24,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:06:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-16 00:06:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-12-16 00:06:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2021-12-16 00:06:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-12-16 00:06:24,108 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9 [2021-12-16 00:06:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:06:24,109 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-12-16 00:06:24,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-12-16 00:06:24,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 00:06:24,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:24,110 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:24,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:06:24,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:24,324 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1583233494, now seen corresponding path program 2 times [2021-12-16 00:06:24,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:24,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650741728] [2021-12-16 00:06:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:24,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:24,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650741728] [2021-12-16 00:06:24,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650741728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:06:24,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003437475] [2021-12-16 00:06:24,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 00:06:24,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:24,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:06:24,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:06:24,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:06:24,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 00:06:24,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:06:24,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:06:24,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:06:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:24,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:06:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:24,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003437475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:06:24,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:06:24,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-16 00:06:24,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46087233] [2021-12-16 00:06:24,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:06:24,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 00:06:24,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 00:06:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:06:24,695 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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) [2021-12-16 00:06:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:06:24,895 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-12-16 00:06:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 00:06:24,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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 15 [2021-12-16 00:06:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:06:24,900 INFO L225 Difference]: With dead ends: 30 [2021-12-16 00:06:24,900 INFO L226 Difference]: Without dead ends: 26 [2021-12-16 00:06:24,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-12-16 00:06:24,901 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:06:24,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:06:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-16 00:06:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-16 00:06:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-12-16 00:06:24,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2021-12-16 00:06:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:06:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-12-16 00:06:24,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 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) [2021-12-16 00:06:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-12-16 00:06:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 00:06:24,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:24,913 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:24,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:06:25,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-16 00:06:25,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:25,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:25,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1226953280, now seen corresponding path program 3 times [2021-12-16 00:06:25,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:25,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979027582] [2021-12-16 00:06:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:25,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:25,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:25,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979027582] [2021-12-16 00:06:25,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979027582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:06:25,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54952895] [2021-12-16 00:06:25,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 00:06:25,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:06:25,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:06:25,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:06:25,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-16 00:06:25,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:06:25,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 00:06:25,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:06:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:25,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:06:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:26,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54952895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:06:26,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:06:26,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-12-16 00:06:26,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324374730] [2021-12-16 00:06:26,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:06:26,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-16 00:06:26,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-16 00:06:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-12-16 00:06:26,017 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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) [2021-12-16 00:06:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:06:26,459 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-12-16 00:06:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 00:06:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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) Word has length 25 [2021-12-16 00:06:26,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:06:26,460 INFO L225 Difference]: With dead ends: 50 [2021-12-16 00:06:26,460 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 00:06:26,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=625, Invalid=1267, Unknown=0, NotChecked=0, Total=1892 [2021-12-16 00:06:26,462 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:06:26,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 33 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:06:26,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 00:06:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-16 00:06:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-12-16 00:06:26,483 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 25 [2021-12-16 00:06:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:06:26,484 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-12-16 00:06:26,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 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) [2021-12-16 00:06:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-12-16 00:06:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 00:06:26,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:26,487 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:26,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 00:06:26,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:26,712 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1096199572, now seen corresponding path program 4 times [2021-12-16 00:06:26,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:26,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731652689] [2021-12-16 00:06:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:26,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:27,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:27,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731652689] [2021-12-16 00:06:27,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731652689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:06:27,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090319934] [2021-12-16 00:06:27,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 00:06:27,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:27,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:06:27,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:06:27,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:06:27,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 00:06:27,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:06:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 00:06:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:06:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:27,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:06:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:27,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090319934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:06:27,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:06:27,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 46 [2021-12-16 00:06:27,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132299010] [2021-12-16 00:06:27,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:06:27,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 00:06:27,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 00:06:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=1401, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 00:06:27,976 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:29,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:06:29,033 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-12-16 00:06:29,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-16 00:06:29,034 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-16 00:06:29,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:06:29,035 INFO L225 Difference]: With dead ends: 90 [2021-12-16 00:06:29,035 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 00:06:29,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2340, Invalid=4632, Unknown=0, NotChecked=0, Total=6972 [2021-12-16 00:06:29,038 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 117 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:06:29,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 31 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:06:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 00:06:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-16 00:06:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:29,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-12-16 00:06:29,058 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 45 [2021-12-16 00:06:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:06:29,059 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-12-16 00:06:29,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-12-16 00:06:29,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-16 00:06:29,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:29,064 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:29,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:06:29,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:29,288 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:29,288 INFO L85 PathProgramCache]: Analyzing trace with hash -246641092, now seen corresponding path program 5 times [2021-12-16 00:06:29,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:29,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244913198] [2021-12-16 00:06:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:29,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:30,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244913198] [2021-12-16 00:06:30,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244913198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:06:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944184461] [2021-12-16 00:06:30,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 00:06:30,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:06:30,164 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:06:30,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:06:30,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-12-16 00:06:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:06:30,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 00:06:30,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:06:31,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:31,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:06:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:33,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944184461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:06:33,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:06:33,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 103 [2021-12-16 00:06:33,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577230566] [2021-12-16 00:06:33,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:06:33,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-12-16 00:06:33,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:33,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-12-16 00:06:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2168, Invalid=8338, Unknown=0, NotChecked=0, Total=10506 [2021-12-16 00:06:33,954 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:06:42,849 INFO L93 Difference]: Finished difference Result 170 states and 209 transitions. [2021-12-16 00:06:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-16 00:06:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 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 85 [2021-12-16 00:06:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:06:42,851 INFO L225 Difference]: With dead ends: 170 [2021-12-16 00:06:42,851 INFO L226 Difference]: Without dead ends: 166 [2021-12-16 00:06:42,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7456 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=9838, Invalid=22742, Unknown=0, NotChecked=0, Total=32580 [2021-12-16 00:06:42,859 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 215 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 00:06:42,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 93 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 00:06:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-16 00:06:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-12-16 00:06:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:42,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2021-12-16 00:06:42,872 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 85 [2021-12-16 00:06:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:06:42,872 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2021-12-16 00:06:42,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 103 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:06:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2021-12-16 00:06:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-16 00:06:42,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:06:42,875 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:06:42,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 00:06:43,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:43,096 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:06:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:06:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1344997492, now seen corresponding path program 6 times [2021-12-16 00:06:43,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:06:43,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481469075] [2021-12-16 00:06:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:06:43,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:06:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:06:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:45,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:06:45,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481469075] [2021-12-16 00:06:45,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481469075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:06:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050655339] [2021-12-16 00:06:45,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 00:06:45,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:06:45,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:06:45,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:06:45,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:06:45,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2021-12-16 00:06:45,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 00:06:45,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-16 00:06:45,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:06:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:46,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 00:06:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:06:55,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050655339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 00:06:55,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 00:06:55,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 166 [2021-12-16 00:06:55,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876747007] [2021-12-16 00:06:55,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 00:06:55,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2021-12-16 00:06:55,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:06:55,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2021-12-16 00:06:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9819, Invalid=17571, Unknown=0, NotChecked=0, Total=27390 [2021-12-16 00:06:55,170 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 166 states, 166 states have (on average 1.9939759036144578) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:07:12,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:07:12,340 INFO L93 Difference]: Finished difference Result 330 states and 409 transitions. [2021-12-16 00:07:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-12-16 00:07:12,341 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.9939759036144578) internal successors, (331), 166 states have internal predecessors, (331), 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 165 [2021-12-16 00:07:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:07:12,345 INFO L225 Difference]: With dead ends: 330 [2021-12-16 00:07:12,345 INFO L226 Difference]: Without dead ends: 326 [2021-12-16 00:07:12,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22126 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=35730, Invalid=68922, Unknown=0, NotChecked=0, Total=104652 [2021-12-16 00:07:12,352 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 474 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:07:12,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 36 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 00:07:12,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-16 00:07:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-12-16 00:07:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.003076923076923) internal successors, (326), 325 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:07:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 326 transitions. [2021-12-16 00:07:12,374 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 326 transitions. Word has length 165 [2021-12-16 00:07:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:07:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 326 transitions. [2021-12-16 00:07:12,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.9939759036144578) internal successors, (331), 166 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 00:07:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 326 transitions. [2021-12-16 00:07:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-16 00:07:12,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:07:12,379 INFO L514 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:07:12,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:07:12,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:07:12,597 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:07:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:07:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1186490924, now seen corresponding path program 7 times [2021-12-16 00:07:12,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:07:12,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879917533] [2021-12-16 00:07:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:07:12,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:07:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:07:20,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:07:20,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:07:20,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879917533] [2021-12-16 00:07:20,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879917533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:07:20,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088628362] [2021-12-16 00:07:20,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 00:07:20,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:07:20,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:07:20,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:07:20,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:07:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:07:23,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-16 00:07:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:07:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25281 backedges. 0 proven. 25281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:07:24,799 INFO L328 TraceCheckSpWp]: Computing backward predicates...