./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.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 5d3b64744a19af136ca9c439b2264a15465f658e2e3d4a576a98d96e4b8aff92 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 18:25:12,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:25:12,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:25:12,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:25:12,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:25:12,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:25:12,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:25:12,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:25:12,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:25:12,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:25:12,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:25:12,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:25:12,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:25:12,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:25:12,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:25:12,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:25:12,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:25:12,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:25:12,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:25:12,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:25:12,200 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:25:12,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:25:12,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:25:12,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:25:12,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:25:12,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:25:12,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:25:12,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:25:12,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:25:12,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:25:12,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:25:12,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:25:12,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:25:12,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:25:12,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:25:12,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:25:12,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:25:12,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:25:12,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:25:12,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:25:12,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:25:12,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:25:12,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:25:12,230 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:25:12,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:25:12,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:25:12,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:25:12,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:25:12,231 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:25:12,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:25:12,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:25:12,232 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:25:12,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:25:12,233 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:25:12,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:25:12,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:25:12,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:25:12,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:25:12,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:25:12,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:25:12,234 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:25:12,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:25:12,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:25:12,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:25:12,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:25:12,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:25:12,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:25:12,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:25:12,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:25:12,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:25:12,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:25:12,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:25:12,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:25:12,236 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:25:12,236 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:25:12,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:25:12,236 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d3b64744a19af136ca9c439b2264a15465f658e2e3d4a576a98d96e4b8aff92 [2022-07-13 18:25:12,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:25:12,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:25:12,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:25:12,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:25:12,430 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:25:12,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2022-07-13 18:25:12,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb32d3e5/8a95b67f69c74d2da06c59c2099a6931/FLAG503a8b706 [2022-07-13 18:25:12,844 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:25:12,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2022-07-13 18:25:12,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb32d3e5/8a95b67f69c74d2da06c59c2099a6931/FLAG503a8b706 [2022-07-13 18:25:13,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb32d3e5/8a95b67f69c74d2da06c59c2099a6931 [2022-07-13 18:25:13,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:25:13,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:25:13,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:25:13,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:25:13,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:25:13,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c026732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13, skipping insertion in model container [2022-07-13 18:25:13,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:25:13,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:25:13,445 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/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c[8246,8259] [2022-07-13 18:25:13,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:25:13,458 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:25:13,493 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/seq-mthreaded/pals_lcr.4.1.ufo.BOUNDED-8.pals.c[8246,8259] [2022-07-13 18:25:13,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:25:13,503 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:25:13,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13 WrapperNode [2022-07-13 18:25:13,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:25:13,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:25:13,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:25:13,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:25:13,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,520 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,546 INFO L137 Inliner]: procedures = 22, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 275 [2022-07-13 18:25:13,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:25:13,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:25:13,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:25:13,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:25:13,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:25:13,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:25:13,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:25:13,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:25:13,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (1/1) ... [2022-07-13 18:25:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:25:13,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:13,608 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) [2022-07-13 18:25:13,615 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 [2022-07-13 18:25:13,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:25:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:25:13,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:25:13,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:25:13,704 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:25:13,705 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:25:13,942 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:25:13,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:25:13,961 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 18:25:13,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:13 BoogieIcfgContainer [2022-07-13 18:25:13,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:25:13,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:25:13,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:25:13,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:25:13,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:25:13" (1/3) ... [2022-07-13 18:25:13,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d191efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:13, skipping insertion in model container [2022-07-13 18:25:13,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:25:13" (2/3) ... [2022-07-13 18:25:13,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d191efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:25:13, skipping insertion in model container [2022-07-13 18:25:13,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:25:13" (3/3) ... [2022-07-13 18:25:13,993 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c [2022-07-13 18:25:14,007 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:25:14,007 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:25:14,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:25:14,043 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68486734, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@631449db [2022-07-13 18:25:14,043 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:25:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 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) [2022-07-13 18:25:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 18:25:14,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1837107710, now seen corresponding path program 1 times [2022-07-13 18:25:14,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772505267] [2022-07-13 18:25:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772505267] [2022-07-13 18:25:14,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772505267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 18:25:14,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097012419] [2022-07-13 18:25:14,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 18:25:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 18:25:14,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 18:25:14,189 INFO L87 Difference]: Start difference. First operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-07-13 18:25:14,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,204 INFO L93 Difference]: Finished difference Result 126 states and 204 transitions. [2022-07-13 18:25:14,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 18:25:14,206 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 18:25:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,212 INFO L225 Difference]: With dead ends: 126 [2022-07-13 18:25:14,212 INFO L226 Difference]: Without dead ends: 73 [2022-07-13 18:25:14,215 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 [2022-07-13 18:25:14,219 INFO L413 NwaCegarLoop]: 125 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, 125 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 [2022-07-13 18:25:14,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-13 18:25:14,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-13 18:25:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 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) [2022-07-13 18:25:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2022-07-13 18:25:14,243 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 29 [2022-07-13 18:25:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,244 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2022-07-13 18:25:14,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 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) [2022-07-13 18:25:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2022-07-13 18:25:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 18:25:14,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:25:14,246 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1971121216, now seen corresponding path program 1 times [2022-07-13 18:25:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856415911] [2022-07-13 18:25:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856415911] [2022-07-13 18:25:14,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856415911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:25:14,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067415896] [2022-07-13 18:25:14,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:25:14,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:25:14,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:25:14,319 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-13 18:25:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,410 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2022-07-13 18:25:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:14,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 18:25:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,412 INFO L225 Difference]: With dead ends: 165 [2022-07-13 18:25:14,412 INFO L226 Difference]: Without dead ends: 117 [2022-07-13 18:25:14,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:25:14,414 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 71 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 440 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-13 18:25:14,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2022-07-13 18:25:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 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) [2022-07-13 18:25:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2022-07-13 18:25:14,425 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 29 [2022-07-13 18:25:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,425 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2022-07-13 18:25:14,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2022-07-13 18:25:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2022-07-13 18:25:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:14,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 18:25:14,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1333293339, now seen corresponding path program 1 times [2022-07-13 18:25:14,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326726280] [2022-07-13 18:25:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326726280] [2022-07-13 18:25:14,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326726280] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:14,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987641369] [2022-07-13 18:25:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:14,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,490 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,502 INFO L93 Difference]: Finished difference Result 155 states and 226 transitions. [2022-07-13 18:25:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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 51 [2022-07-13 18:25:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,504 INFO L225 Difference]: With dead ends: 155 [2022-07-13 18:25:14,504 INFO L226 Difference]: Without dead ends: 111 [2022-07-13 18:25:14,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,505 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 220 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-13 18:25:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-07-13 18:25:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4351851851851851) internal successors, (155), 108 states have internal predecessors, (155), 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) [2022-07-13 18:25:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 155 transitions. [2022-07-13 18:25:14,512 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 155 transitions. Word has length 51 [2022-07-13 18:25:14,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,512 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 155 transitions. [2022-07-13 18:25:14,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,513 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 155 transitions. [2022-07-13 18:25:14,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:14,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:25:14,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,514 INFO L85 PathProgramCache]: Analyzing trace with hash -606737519, now seen corresponding path program 1 times [2022-07-13 18:25:14,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515067520] [2022-07-13 18:25:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515067520] [2022-07-13 18:25:14,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515067520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:14,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762217746] [2022-07-13 18:25:14,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:14,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:14,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,567 INFO L87 Difference]: Start difference. First operand 109 states and 155 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,582 INFO L93 Difference]: Finished difference Result 257 states and 387 transitions. [2022-07-13 18:25:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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 51 [2022-07-13 18:25:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,584 INFO L225 Difference]: With dead ends: 257 [2022-07-13 18:25:14,584 INFO L226 Difference]: Without dead ends: 177 [2022-07-13 18:25:14,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,586 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 55 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 219 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-13 18:25:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2022-07-13 18:25:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 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) [2022-07-13 18:25:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2022-07-13 18:25:14,596 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 51 [2022-07-13 18:25:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,596 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2022-07-13 18:25:14,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2022-07-13 18:25:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:14,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 18:25:14,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2093945095, now seen corresponding path program 1 times [2022-07-13 18:25:14,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439761553] [2022-07-13 18:25:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439761553] [2022-07-13 18:25:14,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439761553] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:14,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565248578] [2022-07-13 18:25:14,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,654 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,671 INFO L93 Difference]: Finished difference Result 443 states and 676 transitions. [2022-07-13 18:25:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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 51 [2022-07-13 18:25:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,673 INFO L225 Difference]: With dead ends: 443 [2022-07-13 18:25:14,673 INFO L226 Difference]: Without dead ends: 297 [2022-07-13 18:25:14,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,675 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-07-13 18:25:14,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2022-07-13 18:25:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5034013605442176) internal successors, (442), 294 states have internal predecessors, (442), 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) [2022-07-13 18:25:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 442 transitions. [2022-07-13 18:25:14,697 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 442 transitions. Word has length 51 [2022-07-13 18:25:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,698 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 442 transitions. [2022-07-13 18:25:14,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 442 transitions. [2022-07-13 18:25:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:14,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 18:25:14,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1863229059, now seen corresponding path program 1 times [2022-07-13 18:25:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962318770] [2022-07-13 18:25:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962318770] [2022-07-13 18:25:14,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962318770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:14,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974315880] [2022-07-13 18:25:14,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:14,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,787 INFO L87 Difference]: Start difference. First operand 295 states and 442 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:14,816 INFO L93 Difference]: Finished difference Result 779 states and 1188 transitions. [2022-07-13 18:25:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:14,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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 51 [2022-07-13 18:25:14,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:14,822 INFO L225 Difference]: With dead ends: 779 [2022-07-13 18:25:14,823 INFO L226 Difference]: Without dead ends: 513 [2022-07-13 18:25:14,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:14,828 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 47 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:14,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 217 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:14,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-07-13 18:25:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2022-07-13 18:25:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.5019607843137255) internal successors, (766), 510 states have internal predecessors, (766), 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) [2022-07-13 18:25:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 766 transitions. [2022-07-13 18:25:14,865 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 766 transitions. Word has length 51 [2022-07-13 18:25:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:14,866 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 766 transitions. [2022-07-13 18:25:14,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2022-07-13 18:25:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 766 transitions. [2022-07-13 18:25:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 18:25:14,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:14,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:14,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 18:25:14,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -645243661, now seen corresponding path program 1 times [2022-07-13 18:25:14,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864556799] [2022-07-13 18:25:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:14,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:14,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:14,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864556799] [2022-07-13 18:25:14,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864556799] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:14,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:14,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:14,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780881139] [2022-07-13 18:25:14,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:14,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:14,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:14,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:14,969 INFO L87 Difference]: Start difference. First operand 511 states and 766 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2022-07-13 18:25:15,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:15,212 INFO L93 Difference]: Finished difference Result 4367 states and 6662 transitions. [2022-07-13 18:25:15,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:25:15,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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 51 [2022-07-13 18:25:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:15,225 INFO L225 Difference]: With dead ends: 4367 [2022-07-13 18:25:15,226 INFO L226 Difference]: Without dead ends: 3885 [2022-07-13 18:25:15,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:15,231 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 765 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:15,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 629 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:25:15,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2022-07-13 18:25:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 991. [2022-07-13 18:25:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.4848484848484849) internal successors, (1470), 990 states have internal predecessors, (1470), 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) [2022-07-13 18:25:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1470 transitions. [2022-07-13 18:25:15,308 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1470 transitions. Word has length 51 [2022-07-13 18:25:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,308 INFO L495 AbstractCegarLoop]: Abstraction has 991 states and 1470 transitions. [2022-07-13 18:25:15,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 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) [2022-07-13 18:25:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1470 transitions. [2022-07-13 18:25:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 18:25:15,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:15,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 18:25:15,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1275401347, now seen corresponding path program 1 times [2022-07-13 18:25:15,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578574458] [2022-07-13 18:25:15,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578574458] [2022-07-13 18:25:15,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578574458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 18:25:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784455834] [2022-07-13 18:25:15,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 18:25:15,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 18:25:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:15,334 INFO L87 Difference]: Start difference. First operand 991 states and 1470 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:15,395 INFO L93 Difference]: Finished difference Result 2397 states and 3570 transitions. [2022-07-13 18:25:15,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 18:25:15,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 18:25:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:15,404 INFO L225 Difference]: With dead ends: 2397 [2022-07-13 18:25:15,404 INFO L226 Difference]: Without dead ends: 1435 [2022-07-13 18:25:15,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 18:25:15,406 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 39 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:15,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 184 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-07-13 18:25:15,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1433. [2022-07-13 18:25:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.4692737430167597) internal successors, (2104), 1432 states have internal predecessors, (2104), 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) [2022-07-13 18:25:15,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2104 transitions. [2022-07-13 18:25:15,475 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2104 transitions. Word has length 53 [2022-07-13 18:25:15,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,475 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 2104 transitions. [2022-07-13 18:25:15,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2104 transitions. [2022-07-13 18:25:15,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 18:25:15,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:15,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 18:25:15,477 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1341894859, now seen corresponding path program 1 times [2022-07-13 18:25:15,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643115874] [2022-07-13 18:25:15,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643115874] [2022-07-13 18:25:15,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643115874] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:15,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882374127] [2022-07-13 18:25:15,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:15,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:15,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:15,580 INFO L87 Difference]: Start difference. First operand 1433 states and 2104 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:15,712 INFO L93 Difference]: Finished difference Result 2837 states and 4178 transitions. [2022-07-13 18:25:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-13 18:25:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:15,717 INFO L225 Difference]: With dead ends: 2837 [2022-07-13 18:25:15,717 INFO L226 Difference]: Without dead ends: 1435 [2022-07-13 18:25:15,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:25:15,718 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 280 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:15,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 287 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-07-13 18:25:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1433. [2022-07-13 18:25:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.452513966480447) internal successors, (2080), 1432 states have internal predecessors, (2080), 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) [2022-07-13 18:25:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2080 transitions. [2022-07-13 18:25:15,782 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2080 transitions. Word has length 53 [2022-07-13 18:25:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:15,782 INFO L495 AbstractCegarLoop]: Abstraction has 1433 states and 2080 transitions. [2022-07-13 18:25:15,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2080 transitions. [2022-07-13 18:25:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-13 18:25:15,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:15,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:15,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 18:25:15,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:15,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1765655459, now seen corresponding path program 1 times [2022-07-13 18:25:15,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:15,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931321341] [2022-07-13 18:25:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:15,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:15,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931321341] [2022-07-13 18:25:15,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931321341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:15,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:15,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 18:25:15,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85279658] [2022-07-13 18:25:15,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:15,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 18:25:15,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:15,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 18:25:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 18:25:15,845 INFO L87 Difference]: Start difference. First operand 1433 states and 2080 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:16,042 INFO L93 Difference]: Finished difference Result 2664 states and 3817 transitions. [2022-07-13 18:25:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 18:25:16,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-13 18:25:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:16,048 INFO L225 Difference]: With dead ends: 2664 [2022-07-13 18:25:16,048 INFO L226 Difference]: Without dead ends: 2662 [2022-07-13 18:25:16,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-07-13 18:25:16,049 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 412 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:16,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 554 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2022-07-13 18:25:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1529. [2022-07-13 18:25:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 1.418848167539267) internal successors, (2168), 1528 states have internal predecessors, (2168), 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) [2022-07-13 18:25:16,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2168 transitions. [2022-07-13 18:25:16,125 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2168 transitions. Word has length 54 [2022-07-13 18:25:16,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:16,125 INFO L495 AbstractCegarLoop]: Abstraction has 1529 states and 2168 transitions. [2022-07-13 18:25:16,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2168 transitions. [2022-07-13 18:25:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:25:16,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:16,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:16,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 18:25:16,127 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1473223963, now seen corresponding path program 1 times [2022-07-13 18:25:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:16,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552649398] [2022-07-13 18:25:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-13 18:25:16,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:16,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552649398] [2022-07-13 18:25:16,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552649398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:16,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:16,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:16,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736200353] [2022-07-13 18:25:16,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:16,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:16,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:16,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:16,171 INFO L87 Difference]: Start difference. First operand 1529 states and 2168 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:16,514 INFO L93 Difference]: Finished difference Result 7835 states and 11137 transitions. [2022-07-13 18:25:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-13 18:25:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:16,529 INFO L225 Difference]: With dead ends: 7835 [2022-07-13 18:25:16,529 INFO L226 Difference]: Without dead ends: 6337 [2022-07-13 18:25:16,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:16,531 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 447 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:16,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 465 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2022-07-13 18:25:16,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 3025. [2022-07-13 18:25:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 1.4153439153439153) internal successors, (4280), 3024 states have internal predecessors, (4280), 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) [2022-07-13 18:25:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4280 transitions. [2022-07-13 18:25:16,710 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4280 transitions. Word has length 78 [2022-07-13 18:25:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:16,710 INFO L495 AbstractCegarLoop]: Abstraction has 3025 states and 4280 transitions. [2022-07-13 18:25:16,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4280 transitions. [2022-07-13 18:25:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:25:16,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:16,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:16,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 18:25:16,712 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash -295558853, now seen corresponding path program 1 times [2022-07-13 18:25:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:16,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141763364] [2022-07-13 18:25:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:16,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:25:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141763364] [2022-07-13 18:25:16,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141763364] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:16,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:16,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526704735] [2022-07-13 18:25:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:16,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:16,766 INFO L87 Difference]: Start difference. First operand 3025 states and 4280 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2022-07-13 18:25:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:17,201 INFO L93 Difference]: Finished difference Result 9331 states and 13249 transitions. [2022-07-13 18:25:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:17,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 78 [2022-07-13 18:25:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:17,221 INFO L225 Difference]: With dead ends: 9331 [2022-07-13 18:25:17,221 INFO L226 Difference]: Without dead ends: 7833 [2022-07-13 18:25:17,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:17,225 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 403 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:17,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 502 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2022-07-13 18:25:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5273. [2022-07-13 18:25:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 5272 states have (on average 1.4089529590288317) internal successors, (7428), 5272 states have internal predecessors, (7428), 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) [2022-07-13 18:25:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 7428 transitions. [2022-07-13 18:25:17,532 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 7428 transitions. Word has length 78 [2022-07-13 18:25:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:17,533 INFO L495 AbstractCegarLoop]: Abstraction has 5273 states and 7428 transitions. [2022-07-13 18:25:17,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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) [2022-07-13 18:25:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 7428 transitions. [2022-07-13 18:25:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:25:17,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:17,534 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 18:25:17,535 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash 836080987, now seen corresponding path program 1 times [2022-07-13 18:25:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947761648] [2022-07-13 18:25:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:25:17,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:17,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947761648] [2022-07-13 18:25:17,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947761648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:17,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:17,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:17,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168218308] [2022-07-13 18:25:17,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:17,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:17,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:17,576 INFO L87 Difference]: Start difference. First operand 5273 states and 7428 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:18,093 INFO L93 Difference]: Finished difference Result 10827 states and 15361 transitions. [2022-07-13 18:25:18,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:18,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-13 18:25:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:18,109 INFO L225 Difference]: With dead ends: 10827 [2022-07-13 18:25:18,109 INFO L226 Difference]: Without dead ends: 9329 [2022-07-13 18:25:18,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:18,116 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 436 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:18,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 519 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2022-07-13 18:25:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 6769. [2022-07-13 18:25:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 1.4095744680851063) internal successors, (9540), 6768 states have internal predecessors, (9540), 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) [2022-07-13 18:25:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 9540 transitions. [2022-07-13 18:25:18,520 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 9540 transitions. Word has length 78 [2022-07-13 18:25:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:18,520 INFO L495 AbstractCegarLoop]: Abstraction has 6769 states and 9540 transitions. [2022-07-13 18:25:18,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 18:25:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 9540 transitions. [2022-07-13 18:25:18,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-13 18:25:18,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:18,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:18,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 18:25:18,523 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:18,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:18,523 INFO L85 PathProgramCache]: Analyzing trace with hash -399378053, now seen corresponding path program 1 times [2022-07-13 18:25:18,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:18,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186110287] [2022-07-13 18:25:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:18,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:18,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186110287] [2022-07-13 18:25:18,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186110287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:25:18,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:25:18,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 18:25:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45780405] [2022-07-13 18:25:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:25:18,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 18:25:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 18:25:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 18:25:18,565 INFO L87 Difference]: Start difference. First operand 6769 states and 9540 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2022-07-13 18:25:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:19,088 INFO L93 Difference]: Finished difference Result 11443 states and 16241 transitions. [2022-07-13 18:25:19,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 18:25:19,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 78 [2022-07-13 18:25:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:19,102 INFO L225 Difference]: With dead ends: 11443 [2022-07-13 18:25:19,103 INFO L226 Difference]: Without dead ends: 10385 [2022-07-13 18:25:19,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:19,106 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 433 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:19,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 483 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2022-07-13 18:25:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 7825. [2022-07-13 18:25:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7824 states have (on average 1.4115541922290389) internal successors, (11044), 7824 states have internal predecessors, (11044), 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) [2022-07-13 18:25:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 11044 transitions. [2022-07-13 18:25:19,641 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 11044 transitions. Word has length 78 [2022-07-13 18:25:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:19,642 INFO L495 AbstractCegarLoop]: Abstraction has 7825 states and 11044 transitions. [2022-07-13 18:25:19,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2022-07-13 18:25:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 11044 transitions. [2022-07-13 18:25:19,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 18:25:19,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:19,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:19,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-13 18:25:19,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:19,645 INFO L85 PathProgramCache]: Analyzing trace with hash -32257762, now seen corresponding path program 1 times [2022-07-13 18:25:19,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:19,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301897232] [2022-07-13 18:25:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:19,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301897232] [2022-07-13 18:25:19,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301897232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:25:19,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206879027] [2022-07-13 18:25:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:19,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:25:19,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:19,700 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) [2022-07-13 18:25:19,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:25:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:19,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-13 18:25:19,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:25:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:20,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:25:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 18:25:20,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206879027] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:25:20,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:25:20,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-07-13 18:25:20,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883089671] [2022-07-13 18:25:20,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:25:20,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 18:25:20,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 18:25:20,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2022-07-13 18:25:20,252 INFO L87 Difference]: Start difference. First operand 7825 states and 11044 transitions. Second operand has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 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) [2022-07-13 18:25:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:21,306 INFO L93 Difference]: Finished difference Result 23420 states and 33378 transitions. [2022-07-13 18:25:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:25:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 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 79 [2022-07-13 18:25:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:21,331 INFO L225 Difference]: With dead ends: 23420 [2022-07-13 18:25:21,332 INFO L226 Difference]: Without dead ends: 17610 [2022-07-13 18:25:21,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2022-07-13 18:25:21,340 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 411 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:21,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 646 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 18:25:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17610 states. [2022-07-13 18:25:22,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17610 to 17441. [2022-07-13 18:25:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17441 states, 17440 states have (on average 1.3958715596330276) internal successors, (24344), 17440 states have internal predecessors, (24344), 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) [2022-07-13 18:25:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17441 states to 17441 states and 24344 transitions. [2022-07-13 18:25:22,321 INFO L78 Accepts]: Start accepts. Automaton has 17441 states and 24344 transitions. Word has length 79 [2022-07-13 18:25:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:22,322 INFO L495 AbstractCegarLoop]: Abstraction has 17441 states and 24344 transitions. [2022-07-13 18:25:22,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 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) [2022-07-13 18:25:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 17441 states and 24344 transitions. [2022-07-13 18:25:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 18:25:22,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:22,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:22,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:25:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 18:25:22,532 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1374783219, now seen corresponding path program 1 times [2022-07-13 18:25:22,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:22,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982707051] [2022-07-13 18:25:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:22,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:22,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982707051] [2022-07-13 18:25:22,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982707051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:25:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56724030] [2022-07-13 18:25:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:22,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:25:22,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:22,665 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) [2022-07-13 18:25:22,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:25:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 18:25:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:25:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:23,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:25:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:23,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56724030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:25:23,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:25:23,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-13 18:25:23,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238023650] [2022-07-13 18:25:23,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:25:23,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 18:25:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 18:25:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-13 18:25:23,575 INFO L87 Difference]: Start difference. First operand 17441 states and 24344 transitions. Second operand has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 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) [2022-07-13 18:25:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:25:29,627 INFO L93 Difference]: Finished difference Result 80171 states and 109477 transitions. [2022-07-13 18:25:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 18:25:29,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 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 80 [2022-07-13 18:25:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:25:29,715 INFO L225 Difference]: With dead ends: 80171 [2022-07-13 18:25:29,715 INFO L226 Difference]: Without dead ends: 66233 [2022-07-13 18:25:29,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=456, Invalid=1266, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 18:25:29,739 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1228 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:25:29,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 1244 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:25:29,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66233 states. [2022-07-13 18:25:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66233 to 37053. [2022-07-13 18:25:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37053 states, 37052 states have (on average 1.3847565583504264) internal successors, (51308), 37052 states have internal predecessors, (51308), 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) [2022-07-13 18:25:32,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37053 states to 37053 states and 51308 transitions. [2022-07-13 18:25:32,775 INFO L78 Accepts]: Start accepts. Automaton has 37053 states and 51308 transitions. Word has length 80 [2022-07-13 18:25:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:25:32,775 INFO L495 AbstractCegarLoop]: Abstraction has 37053 states and 51308 transitions. [2022-07-13 18:25:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 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) [2022-07-13 18:25:32,775 INFO L276 IsEmpty]: Start isEmpty. Operand 37053 states and 51308 transitions. [2022-07-13 18:25:32,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-13 18:25:32,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:25:32,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:25:32,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 18:25:32,979 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,SelfDestructingSolverStorable15 [2022-07-13 18:25:32,979 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:25:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:25:32,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1395542867, now seen corresponding path program 1 times [2022-07-13 18:25:32,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:25:32,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618111013] [2022-07-13 18:25:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:25:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:25:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618111013] [2022-07-13 18:25:33,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618111013] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:25:33,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722956746] [2022-07-13 18:25:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:25:33,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:25:33,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:25:33,168 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) [2022-07-13 18:25:33,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 18:25:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:25:33,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 18:25:33,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:25:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:33,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:25:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 18:25:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722956746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:25:33,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:25:33,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2022-07-13 18:25:33,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391935941] [2022-07-13 18:25:33,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:25:33,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 18:25:33,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:25:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 18:25:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-07-13 18:25:33,956 INFO L87 Difference]: Start difference. First operand 37053 states and 51308 transitions. Second operand has 30 states, 30 states have (on average 7.0) internal successors, (210), 29 states have internal predecessors, (210), 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)