./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/loops-crafted-1/Mono1_1-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73587fb730a0fae8f0f61c4bce66b3ef3eca8012a1c96e30e457f1e4f757a73f --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 23:58:50,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 23:58:50,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 23:58:50,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 23:58:50,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 23:58:50,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 23:58:50,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 23:58:50,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 23:58:50,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 23:58:50,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 23:58:50,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 23:58:50,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 23:58:50,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 23:58:50,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 23:58:50,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 23:58:50,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 23:58:50,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 23:58:50,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 23:58:50,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 23:58:50,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 23:58:50,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 23:58:50,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 23:58:50,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 23:58:50,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 23:58:50,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 23:58:50,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 23:58:50,599 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 23:58:50,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 23:58:50,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 23:58:50,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 23:58:50,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 23:58:50,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 23:58:50,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 23:58:50,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 23:58:50,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 23:58:50,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 23:58:50,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 23:58:50,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 23:58:50,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 23:58:50,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 23:58:50,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 23:58:50,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 23:58:50,634 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 23:58:50,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 23:58:50,635 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 23:58:50,635 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 23:58:50,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 23:58:50,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 23:58:50,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 23:58:50,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 23:58:50,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 23:58:50,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 23:58:50,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:58:50,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 23:58:50,638 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73587fb730a0fae8f0f61c4bce66b3ef3eca8012a1c96e30e457f1e4f757a73f [2023-02-13 23:58:50,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 23:58:50,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 23:58:50,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 23:58:50,850 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 23:58:50,850 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 23:58:50,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c [2023-02-13 23:58:51,881 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 23:58:52,032 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 23:58:52,032 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c [2023-02-13 23:58:52,036 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92bf093f0/918f381cdeb649059e1cfff39537afef/FLAGfda1149e0 [2023-02-13 23:58:52,047 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92bf093f0/918f381cdeb649059e1cfff39537afef [2023-02-13 23:58:52,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 23:58:52,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 23:58:52,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 23:58:52,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 23:58:52,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 23:58:52,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2accca8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52, skipping insertion in model container [2023-02-13 23:58:52,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 23:58:52,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 23:58:52,157 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c[313,326] [2023-02-13 23:58:52,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:58:52,170 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 23:58:52,178 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono1_1-1.c[313,326] [2023-02-13 23:58:52,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:58:52,189 INFO L208 MainTranslator]: Completed translation [2023-02-13 23:58:52,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52 WrapperNode [2023-02-13 23:58:52,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 23:58:52,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 23:58:52,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 23:58:52,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 23:58:52,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,214 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2023-02-13 23:58:52,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 23:58:52,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 23:58:52,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 23:58:52,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 23:58:52,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 23:58:52,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 23:58:52,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 23:58:52,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 23:58:52,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (1/1) ... [2023-02-13 23:58:52,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:58:52,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:58:52,250 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) [2023-02-13 23:58:52,254 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 [2023-02-13 23:58:52,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 23:58:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 23:58:52,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 23:58:52,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 23:58:52,320 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 23:58:52,322 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 23:58:52,431 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 23:58:52,446 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 23:58:52,447 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-13 23:58:52,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:58:52 BoogieIcfgContainer [2023-02-13 23:58:52,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 23:58:52,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 23:58:52,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 23:58:52,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 23:58:52,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 11:58:52" (1/3) ... [2023-02-13 23:58:52,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dc62e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:58:52, skipping insertion in model container [2023-02-13 23:58:52,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:58:52" (2/3) ... [2023-02-13 23:58:52,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dc62e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:58:52, skipping insertion in model container [2023-02-13 23:58:52,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:58:52" (3/3) ... [2023-02-13 23:58:52,460 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2023-02-13 23:58:52,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 23:58:52,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 23:58:52,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 23:58:52,510 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@11c7cdc1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 23:58:52,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 23:58:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-13 23:58:52,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:52,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-13 23:58:52,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2023-02-13 23:58:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:52,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6345116] [2023-02-13 23:58:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:52,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:52,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6345116] [2023-02-13 23:58:52,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6345116] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:58:52,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:58:52,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 23:58:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084680970] [2023-02-13 23:58:52,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:58:52,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 23:58:52,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:58:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 23:58:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 23:58:52,626 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-13 23:58:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:58:52,635 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-02-13 23:58:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 23:58:52,636 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-02-13 23:58:52,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:58:52,640 INFO L225 Difference]: With dead ends: 20 [2023-02-13 23:58:52,640 INFO L226 Difference]: Without dead ends: 8 [2023-02-13 23:58:52,642 INFO L412 NwaCegarLoop]: 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 [2023-02-13 23:58:52,644 INFO L413 NwaCegarLoop]: 13 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, 13 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 [2023-02-13 23:58:52,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:58:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-02-13 23:58:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-02-13 23:58:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2023-02-13 23:58:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-02-13 23:58:52,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2023-02-13 23:58:52,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:58:52,663 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-02-13 23:58:52,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-02-13 23:58:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-02-13 23:58:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-13 23:58:52,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:52,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-13 23:58:52,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 23:58:52,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2023-02-13 23:58:52,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:52,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784249766] [2023-02-13 23:58:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:52,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:52,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784249766] [2023-02-13 23:58:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784249766] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:58:52,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:58:52,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:58:52,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090256469] [2023-02-13 23:58:52,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:58:52,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:58:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:58:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:58:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:58:52,776 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-02-13 23:58:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:58:52,804 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-02-13 23:58:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:58:52,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-02-13 23:58:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:58:52,805 INFO L225 Difference]: With dead ends: 16 [2023-02-13 23:58:52,805 INFO L226 Difference]: Without dead ends: 10 [2023-02-13 23:58:52,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:58:52,806 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:58:52,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:58:52,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-13 23:58:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-13 23:58:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-02-13 23:58:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-13 23:58:52,809 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2023-02-13 23:58:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:58:52,810 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-13 23:58:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-02-13 23:58:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-13 23:58:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-13 23:58:52,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:52,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:58:52,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 23:58:52,811 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:52,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2023-02-13 23:58:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899694547] [2023-02-13 23:58:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:52,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:52,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899694547] [2023-02-13 23:58:52,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899694547] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:58:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387141489] [2023-02-13 23:58:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:52,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:52,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:58:53,016 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) [2023-02-13 23:58:53,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 23:58:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-13 23:58:53,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:58:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:53,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:58:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:53,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387141489] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:58:53,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:58:53,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 23:58:53,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164998085] [2023-02-13 23:58:53,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:58:53,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:58:53,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:58:53,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:58:53,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:58:53,101 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:58:53,146 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2023-02-13 23:58:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:58:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-13 23:58:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:58:53,147 INFO L225 Difference]: With dead ends: 20 [2023-02-13 23:58:53,147 INFO L226 Difference]: Without dead ends: 14 [2023-02-13 23:58:53,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:58:53,148 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:58:53,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:58:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-13 23:58:53,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-02-13 23:58:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-13 23:58:53,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2023-02-13 23:58:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:58:53,152 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-13 23:58:53,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-13 23:58:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-13 23:58:53,152 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:53,152 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:58:53,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 23:58:53,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:53,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2023-02-13 23:58:53,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:53,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263754356] [2023-02-13 23:58:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:53,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:53,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263754356] [2023-02-13 23:58:53,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263754356] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:58:53,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594755603] [2023-02-13 23:58:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:53,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:53,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:58:53,548 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) [2023-02-13 23:58:53,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 23:58:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:53,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 23:58:53,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:58:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:53,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:58:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:53,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594755603] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:58:53,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:58:53,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 10 [2023-02-13 23:58:53,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139493147] [2023-02-13 23:58:53,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:58:53,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-13 23:58:53,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:58:53,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-13 23:58:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:58:53,774 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:58:53,934 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2023-02-13 23:58:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 23:58:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-13 23:58:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:58:53,936 INFO L225 Difference]: With dead ends: 28 [2023-02-13 23:58:53,937 INFO L226 Difference]: Without dead ends: 21 [2023-02-13 23:58:53,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2023-02-13 23:58:53,938 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:58:53,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:58:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-13 23:58:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-13 23:58:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-13 23:58:53,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2023-02-13 23:58:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:58:53,942 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-13 23:58:53,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-13 23:58:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-13 23:58:53,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:53,942 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:58:53,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-13 23:58:54,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-13 23:58:54,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1634475176, now seen corresponding path program 2 times [2023-02-13 23:58:54,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:54,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210166711] [2023-02-13 23:58:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:54,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:54,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:54,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210166711] [2023-02-13 23:58:54,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210166711] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:58:54,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274065415] [2023-02-13 23:58:54,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 23:58:54,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:58:54,325 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) [2023-02-13 23:58:54,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 23:58:54,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 23:58:54,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:58:54,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-13 23:58:54,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:58:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:54,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:58:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:54,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274065415] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:58:54,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:58:54,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2023-02-13 23:58:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290547005] [2023-02-13 23:58:54,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:58:54,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-13 23:58:54,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:58:54,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-13 23:58:54,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2023-02-13 23:58:54,627 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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) [2023-02-13 23:58:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:58:55,865 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2023-02-13 23:58:55,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-13 23:58:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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 20 [2023-02-13 23:58:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:58:55,868 INFO L225 Difference]: With dead ends: 44 [2023-02-13 23:58:55,869 INFO L226 Difference]: Without dead ends: 37 [2023-02-13 23:58:55,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2023-02-13 23:58:55,870 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:58:55,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:58:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-13 23:58:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-13 23:58:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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) [2023-02-13 23:58:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-02-13 23:58:55,876 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 20 [2023-02-13 23:58:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:58:55,876 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-02-13 23:58:55,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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) [2023-02-13 23:58:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-02-13 23:58:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-13 23:58:55,877 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:55,877 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:58:55,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-13 23:58:56,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:56,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1104705856, now seen corresponding path program 3 times [2023-02-13 23:58:56,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:56,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34829638] [2023-02-13 23:58:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:56,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:56,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:56,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34829638] [2023-02-13 23:58:56,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34829638] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:58:56,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221421219] [2023-02-13 23:58:56,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 23:58:56,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:56,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:58:56,398 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) [2023-02-13 23:58:56,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 23:58:56,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-13 23:58:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:58:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 23:58:56,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:58:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-02-13 23:58:56,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:58:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-02-13 23:58:56,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221421219] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:58:56,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:58:56,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 7] total 24 [2023-02-13 23:58:56,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620469412] [2023-02-13 23:58:56,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:58:56,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-13 23:58:56,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:58:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-13 23:58:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2023-02-13 23:58:56,665 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:58:56,972 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-02-13 23:58:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 23:58:56,973 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-13 23:58:56,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:58:56,974 INFO L225 Difference]: With dead ends: 54 [2023-02-13 23:58:56,974 INFO L226 Difference]: Without dead ends: 45 [2023-02-13 23:58:56,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2023-02-13 23:58:56,975 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 23:58:56,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 23:58:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-13 23:58:56,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-02-13 23:58:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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) [2023-02-13 23:58:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-02-13 23:58:56,982 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 36 [2023-02-13 23:58:56,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:58:56,982 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-02-13 23:58:56,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:58:56,983 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-02-13 23:58:56,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-13 23:58:56,983 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:56,983 INFO L195 NwaCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1] [2023-02-13 23:58:56,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 23:58:57,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:57,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:57,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:57,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1664138286, now seen corresponding path program 4 times [2023-02-13 23:58:57,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:57,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400383502] [2023-02-13 23:58:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:57,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 23:58:57,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400383502] [2023-02-13 23:58:57,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400383502] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:58:57,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823788546] [2023-02-13 23:58:57,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 23:58:57,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:57,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:58:57,538 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) [2023-02-13 23:58:57,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 23:58:57,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 23:58:57,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:58:57,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-13 23:58:57,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:58:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:58:57,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:58:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:58:58,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823788546] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:58:58,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:58:58,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 21] total 40 [2023-02-13 23:58:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926459968] [2023-02-13 23:58:58,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:58:58,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-13 23:58:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:58:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-13 23:58:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2023-02-13 23:58:58,541 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 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) [2023-02-13 23:59:45,190 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 129 DAG size of output: 17 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:59:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:59:45,195 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2023-02-13 23:59:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-13 23:59:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 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 44 [2023-02-13 23:59:45,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:59:45,197 INFO L225 Difference]: With dead ends: 96 [2023-02-13 23:59:45,197 INFO L226 Difference]: Without dead ends: 83 [2023-02-13 23:59:45,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=1175, Invalid=2131, Unknown=0, NotChecked=0, Total=3306 [2023-02-13 23:59:45,199 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 23:59:45,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 36 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 23:59:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-13 23:59:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-02-13 23:59:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 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) [2023-02-13 23:59:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2023-02-13 23:59:45,208 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 44 [2023-02-13 23:59:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:59:45,208 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2023-02-13 23:59:45,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.1) internal successors, (84), 40 states have internal predecessors, (84), 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) [2023-02-13 23:59:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2023-02-13 23:59:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-13 23:59:45,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:59:45,210 INFO L195 NwaCegarLoop]: trace histogram [38, 34, 4, 1, 1, 1, 1, 1, 1] [2023-02-13 23:59:45,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-13 23:59:45,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:59:45,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:59:45,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:59:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1705672597, now seen corresponding path program 5 times [2023-02-13 23:59:45,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:59:45,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494921239] [2023-02-13 23:59:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:59:45,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:59:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:59:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 245 proven. 1190 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-13 23:59:46,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:59:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494921239] [2023-02-13 23:59:46,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494921239] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:59:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977933541] [2023-02-13 23:59:46,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 23:59:46,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:59:46,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:59:46,452 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) [2023-02-13 23:59:46,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 00:00:44,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2023-02-14 00:00:44,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 00:00:44,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-14 00:00:44,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 00:00:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:00:45,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 00:00:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 00:00:50,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977933541] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 00:00:50,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 00:00:50,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39, 40] total 78 [2023-02-14 00:00:50,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015727516] [2023-02-14 00:00:50,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 00:00:50,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-14 00:00:50,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 00:00:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-14 00:00:50,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1633, Invalid=4373, Unknown=0, NotChecked=0, Total=6006 [2023-02-14 00:00:50,226 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 78 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 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) [2023-02-14 00:01:55,989 WARN L233 SmtUtils]: Spent 32.57s on a formula simplification. DAG size of input: 259 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 00:02:57,669 WARN L233 SmtUtils]: Spent 24.69s on a formula simplification. DAG size of input: 252 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)