./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/watermelon.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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:57:25,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:57:25,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:57:25,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:57:25,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:57:25,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:57:25,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:57:25,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:57:25,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:57:25,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:57:25,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:57:25,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:57:25,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:57:25,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:57:25,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:57:25,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:57:25,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:57:25,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:57:25,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:57:25,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:57:25,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:57:25,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:57:25,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:57:25,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:57:25,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:57:25,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:57:25,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:57:25,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:57:25,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:57:25,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:57:25,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:57:25,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:57:25,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:57:25,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:57:25,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:57:25,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:57:25,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:57:25,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:57:25,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:57:25,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:57:25,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:57:25,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:57:25,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:57:25,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:57:25,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:57:25,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:57:25,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:57:25,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:57:25,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:57:25,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:57:25,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:57:25,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:57:25,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:57:25,237 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:57:25,238 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:57:25,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:57:25,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:57:25,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2021-12-15 10:57:25,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:57:25,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:57:25,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:57:25,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:57:25,414 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:57:25,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/watermelon.c [2021-12-15 10:57:25,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc52a2460/5198cd14aaea4c1cb44fa378f0907be9/FLAG727fb162a [2021-12-15 10:57:25,804 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:57:25,804 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/watermelon.c [2021-12-15 10:57:25,809 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc52a2460/5198cd14aaea4c1cb44fa378f0907be9/FLAG727fb162a [2021-12-15 10:57:26,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc52a2460/5198cd14aaea4c1cb44fa378f0907be9 [2021-12-15 10:57:26,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:57:26,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:57:26,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:57:26,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:57:26,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:57:26,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264fa4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26, skipping insertion in model container [2021-12-15 10:57:26,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:57:26,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:57:26,382 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/loops-crafted-1/watermelon.c[373,386] [2021-12-15 10:57:26,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:57:26,397 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:57:26,403 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/loops-crafted-1/watermelon.c[373,386] [2021-12-15 10:57:26,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:57:26,414 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:57:26,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26 WrapperNode [2021-12-15 10:57:26,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:57:26,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:57:26,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:57:26,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:57:26,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,434 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2021-12-15 10:57:26,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:57:26,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:57:26,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:57:26,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:57:26,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:57:26,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:57:26,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:57:26,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:57:26,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (1/1) ... [2021-12-15 10:57:26,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:57:26,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:26,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 10:57:26,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 10:57:26,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:57:26,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:57:26,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:57:26,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:57:26,543 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:57:26,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:57:26,631 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:57:26,636 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:57:26,641 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 10:57:26,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:57:26 BoogieIcfgContainer [2021-12-15 10:57:26,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:57:26,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:57:26,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:57:26,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:57:26,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:57:26" (1/3) ... [2021-12-15 10:57:26,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268b3c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:57:26, skipping insertion in model container [2021-12-15 10:57:26,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:57:26" (2/3) ... [2021-12-15 10:57:26,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268b3c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:57:26, skipping insertion in model container [2021-12-15 10:57:26,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:57:26" (3/3) ... [2021-12-15 10:57:26,664 INFO L111 eAbstractionObserver]: Analyzing ICFG watermelon.c [2021-12-15 10:57:26,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:57:26,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:57:26,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:57:26,723 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 10:57:26,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:57:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 10:57:26,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:26,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:26,751 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:26,758 INFO L85 PathProgramCache]: Analyzing trace with hash -2143149025, now seen corresponding path program 1 times [2021-12-15 10:57:26,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:26,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206667779] [2021-12-15 10:57:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:26,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:27,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206667779] [2021-12-15 10:57:27,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206667779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:27,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:57:27,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 10:57:27,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79905252] [2021-12-15 10:57:27,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:27,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 10:57:27,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:27,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 10:57:27,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-15 10:57:27,066 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:27,219 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-12-15 10:57:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 10:57:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 10:57:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:27,226 INFO L225 Difference]: With dead ends: 68 [2021-12-15 10:57:27,226 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 10:57:27,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-12-15 10:57:27,235 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:27,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 159 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 10:57:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-15 10:57:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-15 10:57:27,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 11 [2021-12-15 10:57:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:27,260 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-15 10:57:27,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-15 10:57:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 10:57:27,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:27,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:27,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:57:27,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash -906524851, now seen corresponding path program 1 times [2021-12-15 10:57:27,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:27,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947767909] [2021-12-15 10:57:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:27,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:27,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:27,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947767909] [2021-12-15 10:57:27,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947767909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:27,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:57:27,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:57:27,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285858076] [2021-12-15 10:57:27,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:27,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:57:27,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:27,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:57:27,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:57:27,302 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:27,318 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-12-15 10:57:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:57:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 10:57:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:27,320 INFO L225 Difference]: With dead ends: 35 [2021-12-15 10:57:27,321 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 10:57:27,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:57:27,322 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:27,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 10:57:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2021-12-15 10:57:27,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-12-15 10:57:27,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-12-15 10:57:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:27,328 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-12-15 10:57:27,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-12-15 10:57:27,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 10:57:27,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:27,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:27,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:57:27,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1897717841, now seen corresponding path program 1 times [2021-12-15 10:57:27,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:27,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025130407] [2021-12-15 10:57:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:27,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:27,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:27,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025130407] [2021-12-15 10:57:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025130407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:27,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:57:27,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:57:27,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18523073] [2021-12-15 10:57:27,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:27,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:57:27,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:27,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:57:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:57:27,362 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:27,373 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-12-15 10:57:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:57:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 10:57:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:27,374 INFO L225 Difference]: With dead ends: 48 [2021-12-15 10:57:27,375 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 10:57:27,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:57:27,376 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:27,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 10:57:27,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-15 10:57:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-15 10:57:27,380 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2021-12-15 10:57:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:27,380 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-15 10:57:27,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-15 10:57:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 10:57:27,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:27,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:27,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:57:27,381 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 983883823, now seen corresponding path program 1 times [2021-12-15 10:57:27,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:27,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986176899] [2021-12-15 10:57:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:27,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:27,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:27,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986176899] [2021-12-15 10:57:27,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986176899] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:27,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040278247] [2021-12-15 10:57:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:27,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:27,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:27,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 10:57:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:27,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:57:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:57:27,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:57:27,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040278247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:27,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:57:27,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-12-15 10:57:27,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987605313] [2021-12-15 10:57:27,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:27,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 10:57:27,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 10:57:27,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:57:27,682 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:27,744 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-12-15 10:57:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 10:57:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 10:57:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:27,745 INFO L225 Difference]: With dead ends: 44 [2021-12-15 10:57:27,745 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 10:57:27,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-15 10:57:27,747 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:27,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 10:57:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-12-15 10:57:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-15 10:57:27,751 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 15 [2021-12-15 10:57:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:27,751 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-15 10:57:27,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-15 10:57:27,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 10:57:27,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:27,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:27,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:27,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:27,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:27,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:27,971 INFO L85 PathProgramCache]: Analyzing trace with hash 891572815, now seen corresponding path program 1 times [2021-12-15 10:57:27,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:27,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979256013] [2021-12-15 10:57:27,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:27,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:28,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979256013] [2021-12-15 10:57:28,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979256013] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:28,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664099931] [2021-12-15 10:57:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:28,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:28,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:28,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:28,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 10:57:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:28,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 10:57:28,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:28,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:28,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664099931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:28,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:28,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-15 10:57:28,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285707599] [2021-12-15 10:57:28,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:28,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 10:57:28,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 10:57:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:57:28,114 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:28,127 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-12-15 10:57:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:57:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 10:57:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:28,128 INFO L225 Difference]: With dead ends: 50 [2021-12-15 10:57:28,128 INFO L226 Difference]: Without dead ends: 30 [2021-12-15 10:57:28,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:57:28,129 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:28,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-15 10:57:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-12-15 10:57:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-15 10:57:28,133 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-12-15 10:57:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:28,133 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-15 10:57:28,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,133 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-15 10:57:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 10:57:28,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:28,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:28,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:28,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:28,347 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:28,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 353844429, now seen corresponding path program 2 times [2021-12-15 10:57:28,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:28,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110506072] [2021-12-15 10:57:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:28,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 10:57:28,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110506072] [2021-12-15 10:57:28,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110506072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:28,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:57:28,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 10:57:28,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330999859] [2021-12-15 10:57:28,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:28,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 10:57:28,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 10:57:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 10:57:28,417 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:28,444 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-15 10:57:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 10:57:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 10:57:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:28,445 INFO L225 Difference]: With dead ends: 34 [2021-12-15 10:57:28,445 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 10:57:28,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:57:28,446 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:28,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:28,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 10:57:28,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-15 10:57:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-15 10:57:28,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2021-12-15 10:57:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:28,454 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-15 10:57:28,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-15 10:57:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-15 10:57:28,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:28,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:28,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:57:28,456 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1453414625, now seen corresponding path program 1 times [2021-12-15 10:57:28,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:28,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101131800] [2021-12-15 10:57:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:28,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 10:57:28,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:28,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101131800] [2021-12-15 10:57:28,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101131800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741457423] [2021-12-15 10:57:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:28,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:28,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:28,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:57:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 10:57:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 10:57:28,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:28,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 10:57:28,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741457423] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:28,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:28,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2021-12-15 10:57:28,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371060842] [2021-12-15 10:57:28,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:28,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 10:57:28,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:28,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 10:57:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-15 10:57:28,658 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:28,719 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-12-15 10:57:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 10:57:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-15 10:57:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:28,720 INFO L225 Difference]: With dead ends: 56 [2021-12-15 10:57:28,720 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 10:57:28,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-15 10:57:28,721 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:28,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 78 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 10:57:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-12-15 10:57:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-15 10:57:28,725 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-12-15 10:57:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-15 10:57:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-15 10:57:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 10:57:28,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:28,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:28,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:28,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:28,939 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1604143171, now seen corresponding path program 1 times [2021-12-15 10:57:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826480112] [2021-12-15 10:57:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:28,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 10:57:28,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826480112] [2021-12-15 10:57:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826480112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713686686] [2021-12-15 10:57:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:28,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:28,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:28,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:28,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:57:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 10:57:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 10:57:29,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 10:57:29,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713686686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:29,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:29,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-15 10:57:29,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085116427] [2021-12-15 10:57:29,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:29,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 10:57:29,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:29,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 10:57:29,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:57:29,135 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:29,161 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-12-15 10:57:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 10:57:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 10:57:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:29,163 INFO L225 Difference]: With dead ends: 59 [2021-12-15 10:57:29,163 INFO L226 Difference]: Without dead ends: 54 [2021-12-15 10:57:29,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-15 10:57:29,164 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:29,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-15 10:57:29,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2021-12-15 10:57:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-12-15 10:57:29,168 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 23 [2021-12-15 10:57:29,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:29,168 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-12-15 10:57:29,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-12-15 10:57:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 10:57:29,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:29,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:29,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:29,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:29,384 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1602296129, now seen corresponding path program 1 times [2021-12-15 10:57:29,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884426284] [2021-12-15 10:57:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:29,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 10:57:29,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884426284] [2021-12-15 10:57:29,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884426284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:57:29,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:57:29,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-15 10:57:29,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582257705] [2021-12-15 10:57:29,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:57:29,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 10:57:29,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 10:57:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-15 10:57:29,455 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:29,505 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-12-15 10:57:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 10:57:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 10:57:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:29,506 INFO L225 Difference]: With dead ends: 49 [2021-12-15 10:57:29,506 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 10:57:29,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-15 10:57:29,507 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:29,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 82 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 10:57:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 10:57:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-12-15 10:57:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-15 10:57:29,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2021-12-15 10:57:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:29,512 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-15 10:57:29,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-15 10:57:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 10:57:29,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:29,512 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:29,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 10:57:29,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1934230497, now seen corresponding path program 2 times [2021-12-15 10:57:29,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:29,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642478743] [2021-12-15 10:57:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:29,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:29,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642478743] [2021-12-15 10:57:29,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642478743] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:29,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164261442] [2021-12-15 10:57:29,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:57:29,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:29,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:29,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:29,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 10:57:29,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:57:29,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 10:57:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:30,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:30,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164261442] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:30,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:30,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-15 10:57:30,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539702917] [2021-12-15 10:57:30,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:30,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 10:57:30,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 10:57:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-12-15 10:57:30,217 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:30,467 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-12-15 10:57:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 10:57:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 10:57:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:30,468 INFO L225 Difference]: With dead ends: 55 [2021-12-15 10:57:30,468 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 10:57:30,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-12-15 10:57:30,469 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:30,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 10:57:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-12-15 10:57:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-12-15 10:57:30,472 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2021-12-15 10:57:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:30,472 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-12-15 10:57:30,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-12-15 10:57:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 10:57:30,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:30,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:30,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:30,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 10:57:30,687 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash 836427775, now seen corresponding path program 2 times [2021-12-15 10:57:30,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:30,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273749862] [2021-12-15 10:57:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:30,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:30,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273749862] [2021-12-15 10:57:30,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273749862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672629950] [2021-12-15 10:57:30,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:57:30,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:30,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:30,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:30,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 10:57:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:57:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 10:57:30,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:31,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:31,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672629950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:31,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:31,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2021-12-15 10:57:31,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119165147] [2021-12-15 10:57:31,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:31,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-15 10:57:31,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:31,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-15 10:57:31,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-12-15 10:57:31,362 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:31,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:31,543 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-12-15 10:57:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 10:57:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 10:57:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:31,545 INFO L225 Difference]: With dead ends: 47 [2021-12-15 10:57:31,545 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 10:57:31,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2021-12-15 10:57:31,546 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:31,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 31 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 10:57:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-12-15 10:57:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-12-15 10:57:31,550 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2021-12-15 10:57:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:31,550 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-12-15 10:57:31,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-12-15 10:57:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 10:57:31,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:31,551 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:31,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:31,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:31,772 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:31,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:31,772 INFO L85 PathProgramCache]: Analyzing trace with hash 924111969, now seen corresponding path program 3 times [2021-12-15 10:57:31,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:31,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554633149] [2021-12-15 10:57:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:31,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:31,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554633149] [2021-12-15 10:57:31,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554633149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:31,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334505550] [2021-12-15 10:57:31,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:57:31,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:31,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:31,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:31,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 10:57:32,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 10:57:32,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:32,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 10:57:32,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:32,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:32,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334505550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:32,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:32,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2021-12-15 10:57:32,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645881391] [2021-12-15 10:57:32,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:32,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-15 10:57:32,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:32,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-15 10:57:32,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-12-15 10:57:32,630 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:33,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:33,168 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-12-15 10:57:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 10:57:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 10:57:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:33,171 INFO L225 Difference]: With dead ends: 83 [2021-12-15 10:57:33,171 INFO L226 Difference]: Without dead ends: 64 [2021-12-15 10:57:33,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 10:57:33,172 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 175 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:33,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 117 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-15 10:57:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-12-15 10:57:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-12-15 10:57:33,176 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 27 [2021-12-15 10:57:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:33,177 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-12-15 10:57:33,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-12-15 10:57:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 10:57:33,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:33,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:33,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:33,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:33,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:33,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:33,388 INFO L85 PathProgramCache]: Analyzing trace with hash -98803427, now seen corresponding path program 3 times [2021-12-15 10:57:33,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:33,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742849252] [2021-12-15 10:57:33,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:33,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:33,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:33,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742849252] [2021-12-15 10:57:33,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742849252] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:33,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370986935] [2021-12-15 10:57:33,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:57:33,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:33,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:33,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 10:57:33,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-15 10:57:33,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-15 10:57:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:33,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:34,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370986935] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:34,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:34,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-15 10:57:34,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417742315] [2021-12-15 10:57:34,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:34,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 10:57:34,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:34,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 10:57:34,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-12-15 10:57:34,139 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:34,449 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-12-15 10:57:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:57:34,449 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 10:57:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:34,450 INFO L225 Difference]: With dead ends: 65 [2021-12-15 10:57:34,450 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 10:57:34,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=1094, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 10:57:34,450 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:34,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 113 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 10:57:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-12-15 10:57:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-12-15 10:57:34,454 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 27 [2021-12-15 10:57:34,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:34,455 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-12-15 10:57:34,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-12-15 10:57:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 10:57:34,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:34,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:34,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:34,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 10:57:34,656 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1588252031, now seen corresponding path program 4 times [2021-12-15 10:57:34,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223937933] [2021-12-15 10:57:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:34,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:34,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223937933] [2021-12-15 10:57:34,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223937933] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735444257] [2021-12-15 10:57:34,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:57:34,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:34,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:34,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 10:57:34,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:57:34,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 10:57:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:35,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:35,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735444257] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:35,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:35,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2021-12-15 10:57:35,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042815409] [2021-12-15 10:57:35,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:35,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 10:57:35,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 10:57:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-12-15 10:57:35,401 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:35,721 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-12-15 10:57:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 10:57:35,722 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 10:57:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:35,722 INFO L225 Difference]: With dead ends: 63 [2021-12-15 10:57:35,722 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 10:57:35,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=1021, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 10:57:35,723 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:35,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 10:57:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-12-15 10:57:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-15 10:57:35,727 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2021-12-15 10:57:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:35,728 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-15 10:57:35,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-15 10:57:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 10:57:35,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:35,729 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:35,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:35,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 10:57:35,944 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:35,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:35,945 INFO L85 PathProgramCache]: Analyzing trace with hash -462032417, now seen corresponding path program 4 times [2021-12-15 10:57:35,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:35,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914054137] [2021-12-15 10:57:35,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:35,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:36,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914054137] [2021-12-15 10:57:36,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914054137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713052696] [2021-12-15 10:57:36,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:57:36,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:36,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:36,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:36,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 10:57:36,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:57:36,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:36,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-15 10:57:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:36,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713052696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:36,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:36,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2021-12-15 10:57:36,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050259088] [2021-12-15 10:57:36,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:36,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 10:57:36,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:36,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 10:57:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-12-15 10:57:36,652 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:36,870 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-12-15 10:57:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 10:57:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 10:57:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:36,871 INFO L225 Difference]: With dead ends: 53 [2021-12-15 10:57:36,871 INFO L226 Difference]: Without dead ends: 47 [2021-12-15 10:57:36,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=914, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 10:57:36,872 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 125 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:36,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 33 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-15 10:57:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-15 10:57:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-12-15 10:57:36,877 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 29 [2021-12-15 10:57:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:36,877 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-12-15 10:57:36,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-12-15 10:57:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 10:57:36,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:36,878 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:36,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:37,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 10:57:37,094 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1355616703, now seen corresponding path program 5 times [2021-12-15 10:57:37,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:37,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747147675] [2021-12-15 10:57:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:37,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:37,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:37,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747147675] [2021-12-15 10:57:37,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747147675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:37,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444338572] [2021-12-15 10:57:37,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:57:37,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:37,338 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:37,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 10:57:37,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 10:57:37,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 10:57:37,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:37,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:38,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444338572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:38,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:38,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2021-12-15 10:57:38,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107157563] [2021-12-15 10:57:38,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:38,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-15 10:57:38,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-15 10:57:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2021-12-15 10:57:38,126 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:38,828 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-12-15 10:57:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 10:57:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 10:57:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:38,829 INFO L225 Difference]: With dead ends: 93 [2021-12-15 10:57:38,829 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 10:57:38,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=1771, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 10:57:38,830 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 168 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:38,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 147 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:38,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 10:57:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2021-12-15 10:57:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-15 10:57:38,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 31 [2021-12-15 10:57:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:38,843 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-15 10:57:38,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-15 10:57:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 10:57:38,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:38,845 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:38,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:39,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 10:57:39,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:39,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:39,061 INFO L85 PathProgramCache]: Analyzing trace with hash 943358845, now seen corresponding path program 5 times [2021-12-15 10:57:39,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:39,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272889827] [2021-12-15 10:57:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:39,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:39,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272889827] [2021-12-15 10:57:39,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272889827] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072346693] [2021-12-15 10:57:39,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:57:39,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:39,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:39,254 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:39,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 10:57:39,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-15 10:57:39,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 10:57:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:39,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:39,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072346693] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:39,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:39,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-12-15 10:57:39,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991564825] [2021-12-15 10:57:39,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:39,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-15 10:57:39,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-15 10:57:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 10:57:39,879 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:40,199 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-12-15 10:57:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 10:57:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 10:57:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:40,199 INFO L225 Difference]: With dead ends: 71 [2021-12-15 10:57:40,199 INFO L226 Difference]: Without dead ends: 65 [2021-12-15 10:57:40,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=511, Invalid=1469, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 10:57:40,200 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:40,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 84 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-15 10:57:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-12-15 10:57:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-12-15 10:57:40,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 31 [2021-12-15 10:57:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:40,204 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-12-15 10:57:40,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-12-15 10:57:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 10:57:40,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:40,205 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:40,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:40,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 10:57:40,419 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1916151841, now seen corresponding path program 6 times [2021-12-15 10:57:40,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:40,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460495086] [2021-12-15 10:57:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:40,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:40,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:40,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460495086] [2021-12-15 10:57:40,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460495086] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:40,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98572064] [2021-12-15 10:57:40,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:57:40,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:40,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:40,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:40,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 10:57:40,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 10:57:40,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:40,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 10:57:40,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:40,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:41,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98572064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:41,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:41,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-15 10:57:41,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469645716] [2021-12-15 10:57:41,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:41,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 10:57:41,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 10:57:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 10:57:41,218 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:41,555 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-12-15 10:57:41,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-15 10:57:41,556 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 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 33 [2021-12-15 10:57:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:41,556 INFO L225 Difference]: With dead ends: 71 [2021-12-15 10:57:41,556 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 10:57:41,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2021-12-15 10:57:41,557 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:41,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 67 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:41,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 10:57:41,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-15 10:57:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-12-15 10:57:41,561 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 33 [2021-12-15 10:57:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:41,561 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-12-15 10:57:41,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-12-15 10:57:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-15 10:57:41,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:41,562 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:41,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-15 10:57:41,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 10:57:41,762 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:41,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1672289471, now seen corresponding path program 6 times [2021-12-15 10:57:41,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:41,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684809172] [2021-12-15 10:57:41,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:41,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:41,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684809172] [2021-12-15 10:57:41,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684809172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:41,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291034398] [2021-12-15 10:57:41,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:57:41,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:41,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:41,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:41,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 10:57:41,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 10:57:41,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:41,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-15 10:57:41,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:42,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:42,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:42,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291034398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:42,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:42,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-15 10:57:42,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356944412] [2021-12-15 10:57:42,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:42,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-15 10:57:42,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-15 10:57:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-12-15 10:57:42,536 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:42,783 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-12-15 10:57:42,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 10:57:42,784 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 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 33 [2021-12-15 10:57:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:42,784 INFO L225 Difference]: With dead ends: 59 [2021-12-15 10:57:42,784 INFO L226 Difference]: Without dead ends: 53 [2021-12-15 10:57:42,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-12-15 10:57:42,785 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 163 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:42,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 40 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-15 10:57:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-12-15 10:57:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-12-15 10:57:42,789 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 33 [2021-12-15 10:57:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:42,789 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-12-15 10:57:42,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:42,789 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-12-15 10:57:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 10:57:42,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:42,790 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:42,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:42,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:42,990 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1028317473, now seen corresponding path program 7 times [2021-12-15 10:57:42,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:42,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827903332] [2021-12-15 10:57:42,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:42,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:43,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:43,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827903332] [2021-12-15 10:57:43,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827903332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:43,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566600407] [2021-12-15 10:57:43,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:57:43,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:43,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:43,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:43,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-15 10:57:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 10:57:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:43,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:44,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566600407] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:44,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:44,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2021-12-15 10:57:44,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453921711] [2021-12-15 10:57:44,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:44,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-15 10:57:44,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-15 10:57:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-12-15 10:57:44,029 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:44,699 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-12-15 10:57:44,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 10:57:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-15 10:57:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:44,700 INFO L225 Difference]: With dead ends: 103 [2021-12-15 10:57:44,700 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 10:57:44,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=600, Invalid=2262, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 10:57:44,702 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 207 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:44,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 96 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 10:57:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-12-15 10:57:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-12-15 10:57:44,706 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2021-12-15 10:57:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:44,706 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-12-15 10:57:44,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:44,707 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-12-15 10:57:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 10:57:44,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:44,707 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:44,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:44,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:44,915 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash 208821981, now seen corresponding path program 7 times [2021-12-15 10:57:44,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319804242] [2021-12-15 10:57:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:44,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:45,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319804242] [2021-12-15 10:57:45,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319804242] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009284763] [2021-12-15 10:57:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:57:45,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:45,151 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:45,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-15 10:57:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-15 10:57:45,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:45,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:45,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009284763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:45,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:45,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2021-12-15 10:57:45,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162448349] [2021-12-15 10:57:45,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:45,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-15 10:57:45,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:45,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-15 10:57:45,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-12-15 10:57:45,830 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:46,205 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-12-15 10:57:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 10:57:46,206 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-15 10:57:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:46,206 INFO L225 Difference]: With dead ends: 77 [2021-12-15 10:57:46,206 INFO L226 Difference]: Without dead ends: 71 [2021-12-15 10:57:46,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=652, Invalid=1898, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 10:57:46,207 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:46,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 93 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-15 10:57:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2021-12-15 10:57:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-15 10:57:46,212 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2021-12-15 10:57:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:46,212 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-15 10:57:46,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-15 10:57:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 10:57:46,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:46,213 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:46,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:46,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:46,423 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash 863525695, now seen corresponding path program 8 times [2021-12-15 10:57:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310638360] [2021-12-15 10:57:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:46,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:46,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310638360] [2021-12-15 10:57:46,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310638360] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443411322] [2021-12-15 10:57:46,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:57:46,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:46,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:46,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:46,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-15 10:57:46,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:57:46,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:46,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 10:57:46,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:47,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443411322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:47,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:47,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2021-12-15 10:57:47,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926947763] [2021-12-15 10:57:47,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:47,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 10:57:47,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:47,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 10:57:47,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 10:57:47,391 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:47,769 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2021-12-15 10:57:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 10:57:47,770 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 10:57:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:47,770 INFO L225 Difference]: With dead ends: 79 [2021-12-15 10:57:47,770 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 10:57:47,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=519, Invalid=1833, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 10:57:47,771 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:47,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 57 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:47,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 10:57:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-12-15 10:57:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-12-15 10:57:47,776 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2021-12-15 10:57:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:47,776 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-12-15 10:57:47,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-12-15 10:57:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 10:57:47,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:47,777 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:47,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:47,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:47,988 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1276272481, now seen corresponding path program 8 times [2021-12-15 10:57:47,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:47,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997030405] [2021-12-15 10:57:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:47,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:48,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:48,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997030405] [2021-12-15 10:57:48,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997030405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:48,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072140141] [2021-12-15 10:57:48,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:57:48,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:48,241 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:48,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-15 10:57:48,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:57:48,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:48,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-15 10:57:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:48,637 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:48,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072140141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:48,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:48,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2021-12-15 10:57:48,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112147899] [2021-12-15 10:57:48,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:48,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-15 10:57:48,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-15 10:57:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2021-12-15 10:57:48,899 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:49,203 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-12-15 10:57:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-15 10:57:49,204 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 10:57:49,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:49,205 INFO L225 Difference]: With dead ends: 65 [2021-12-15 10:57:49,205 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 10:57:49,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=602, Invalid=1654, Unknown=0, NotChecked=0, Total=2256 [2021-12-15 10:57:49,206 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 186 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:49,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 58 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 10:57:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2021-12-15 10:57:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-12-15 10:57:49,214 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2021-12-15 10:57:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:49,215 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-12-15 10:57:49,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-12-15 10:57:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 10:57:49,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:49,215 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:49,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:49,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:49,419 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:49,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2138696961, now seen corresponding path program 9 times [2021-12-15 10:57:49,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:49,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143960497] [2021-12-15 10:57:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:49,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:49,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143960497] [2021-12-15 10:57:49,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143960497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806676473] [2021-12-15 10:57:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:57:49,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:49,678 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:49,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-15 10:57:49,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 10:57:49,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:49,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 10:57:49,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:50,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:50,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806676473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:50,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:50,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2021-12-15 10:57:50,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732316958] [2021-12-15 10:57:50,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:50,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-15 10:57:50,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-15 10:57:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2021-12-15 10:57:50,512 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:51,417 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-12-15 10:57:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 10:57:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 10:57:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:51,418 INFO L225 Difference]: With dead ends: 113 [2021-12-15 10:57:51,418 INFO L226 Difference]: Without dead ends: 88 [2021-12-15 10:57:51,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=729, Invalid=2811, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 10:57:51,419 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 158 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:51,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 148 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:57:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-15 10:57:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2021-12-15 10:57:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:51,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-12-15 10:57:51,424 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 39 [2021-12-15 10:57:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:51,424 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-12-15 10:57:51,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-12-15 10:57:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 10:57:51,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:51,425 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:51,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:51,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:51,626 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:51,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:51,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1939262659, now seen corresponding path program 9 times [2021-12-15 10:57:51,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:51,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165692910] [2021-12-15 10:57:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:51,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:51,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165692910] [2021-12-15 10:57:51,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165692910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:51,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091353294] [2021-12-15 10:57:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:57:51,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:51,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:51,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:51,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-15 10:57:51,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-15 10:57:51,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:51,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-15 10:57:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:52,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:52,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091353294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:52,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:52,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2021-12-15 10:57:52,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177667102] [2021-12-15 10:57:52,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:52,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-15 10:57:52,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-15 10:57:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2021-12-15 10:57:52,666 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:53,089 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-12-15 10:57:53,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 10:57:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 10:57:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:53,090 INFO L225 Difference]: With dead ends: 83 [2021-12-15 10:57:53,090 INFO L226 Difference]: Without dead ends: 77 [2021-12-15 10:57:53,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=811, Invalid=2381, Unknown=0, NotChecked=0, Total=3192 [2021-12-15 10:57:53,091 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:53,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 78 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-15 10:57:53,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-12-15 10:57:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-12-15 10:57:53,097 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2021-12-15 10:57:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:53,097 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-12-15 10:57:53,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-12-15 10:57:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 10:57:53,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:53,097 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:53,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:53,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-15 10:57:53,298 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1861511265, now seen corresponding path program 10 times [2021-12-15 10:57:53,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:53,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930208598] [2021-12-15 10:57:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:53,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:53,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:53,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930208598] [2021-12-15 10:57:53,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930208598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558864261] [2021-12-15 10:57:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:57:53,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:53,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:53,552 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:53,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-15 10:57:53,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:57:53,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 10:57:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:54,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:54,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558864261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:54,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:54,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2021-12-15 10:57:54,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357770253] [2021-12-15 10:57:54,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:54,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-15 10:57:54,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-15 10:57:54,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 10:57:54,359 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:54,827 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-12-15 10:57:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 10:57:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 10:57:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:54,828 INFO L225 Difference]: With dead ends: 87 [2021-12-15 10:57:54,828 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 10:57:54,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=644, Invalid=2326, Unknown=0, NotChecked=0, Total=2970 [2021-12-15 10:57:54,829 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 85 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:54,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 91 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 10:57:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-12-15 10:57:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-12-15 10:57:54,835 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 41 [2021-12-15 10:57:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:54,835 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-12-15 10:57:54,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-12-15 10:57:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 10:57:54,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:54,836 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:54,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:55,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-15 10:57:55,051 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1603583359, now seen corresponding path program 10 times [2021-12-15 10:57:55,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:55,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303902208] [2021-12-15 10:57:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:55,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:55,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:55,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303902208] [2021-12-15 10:57:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303902208] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:55,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736842081] [2021-12-15 10:57:55,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:57:55,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:55,319 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:55,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-15 10:57:55,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:57:55,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:55,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 10:57:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:55,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:56,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736842081] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:56,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:56,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2021-12-15 10:57:56,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913272607] [2021-12-15 10:57:56,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:56,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-15 10:57:56,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:56,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-15 10:57:56,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2021-12-15 10:57:56,086 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:56,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:56,403 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-12-15 10:57:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-15 10:57:56,404 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 10:57:56,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:56,404 INFO L225 Difference]: With dead ends: 71 [2021-12-15 10:57:56,404 INFO L226 Difference]: Without dead ends: 65 [2021-12-15 10:57:56,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 10:57:56,405 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:56,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 48 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:57:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-15 10:57:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-12-15 10:57:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2021-12-15 10:57:56,411 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2021-12-15 10:57:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:56,411 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-12-15 10:57:56,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 44 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2021-12-15 10:57:56,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 10:57:56,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:56,412 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:56,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:56,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-15 10:57:56,615 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:56,616 INFO L85 PathProgramCache]: Analyzing trace with hash -573746719, now seen corresponding path program 11 times [2021-12-15 10:57:56,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:56,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862521141] [2021-12-15 10:57:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:56,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:56,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:56,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862521141] [2021-12-15 10:57:56,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862521141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:56,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494193332] [2021-12-15 10:57:56,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:57:56,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:56,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:56,925 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:56,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-15 10:57:56,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 10:57:56,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 10:57:56,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:57,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:57:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:57,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494193332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:57:57,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:57:57,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2021-12-15 10:57:57,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912059109] [2021-12-15 10:57:57,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:57:57,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 10:57:57,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:57:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 10:57:57,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 10:57:57,901 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:58,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:57:58,728 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-12-15 10:57:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 10:57:58,729 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 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 43 [2021-12-15 10:57:58,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:57:58,729 INFO L225 Difference]: With dead ends: 123 [2021-12-15 10:57:58,729 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 10:57:58,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=872, Invalid=3418, Unknown=0, NotChecked=0, Total=4290 [2021-12-15 10:57:58,730 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 213 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:57:58,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 166 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:57:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 10:57:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-12-15 10:57:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-15 10:57:58,736 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 43 [2021-12-15 10:57:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:57:58,736 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-15 10:57:58,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:57:58,736 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-15 10:57:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-15 10:57:58,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:57:58,736 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:57:58,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-15 10:57:58,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:58,937 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:57:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:57:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash -709607267, now seen corresponding path program 11 times [2021-12-15 10:57:58,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:57:58,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804687151] [2021-12-15 10:57:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:57:58,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:57:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:57:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:59,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:57:59,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804687151] [2021-12-15 10:57:59,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804687151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:57:59,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987587569] [2021-12-15 10:57:59,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:57:59,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:57:59,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:57:59,250 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:57:59,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-15 10:57:59,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-15 10:57:59,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:57:59,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 10:57:59,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:57:59,800 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:57:59,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:00,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987587569] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:00,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:00,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2021-12-15 10:58:00,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111526250] [2021-12-15 10:58:00,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:00,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-15 10:58:00,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:00,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-15 10:58:00,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2021-12-15 10:58:00,137 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:00,584 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-12-15 10:58:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 10:58:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 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 43 [2021-12-15 10:58:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:00,585 INFO L225 Difference]: With dead ends: 89 [2021-12-15 10:58:00,585 INFO L226 Difference]: Without dead ends: 83 [2021-12-15 10:58:00,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=988, Invalid=2918, Unknown=0, NotChecked=0, Total=3906 [2021-12-15 10:58:00,586 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:00,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 79 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:58:00,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-15 10:58:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2021-12-15 10:58:00,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:00,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-12-15 10:58:00,593 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 43 [2021-12-15 10:58:00,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:00,594 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-12-15 10:58:00,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 50 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-12-15 10:58:00,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 10:58:00,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:00,594 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:00,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:00,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-15 10:58:00,809 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:00,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:00,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1278685953, now seen corresponding path program 12 times [2021-12-15 10:58:00,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:00,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906000610] [2021-12-15 10:58:00,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:00,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:01,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:01,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906000610] [2021-12-15 10:58:01,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906000610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:01,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814822868] [2021-12-15 10:58:01,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:58:01,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:01,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:01,111 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:01,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-15 10:58:01,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-15 10:58:01,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:01,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 10:58:01,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:01,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:01,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814822868] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:01,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:01,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2021-12-15 10:58:01,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765000802] [2021-12-15 10:58:01,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:01,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-15 10:58:01,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:01,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-15 10:58:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 10:58:01,994 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:02,530 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-12-15 10:58:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-15 10:58:02,530 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 10:58:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:02,530 INFO L225 Difference]: With dead ends: 95 [2021-12-15 10:58:02,530 INFO L226 Difference]: Without dead ends: 68 [2021-12-15 10:58:02,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=783, Invalid=2877, Unknown=0, NotChecked=0, Total=3660 [2021-12-15 10:58:02,531 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:02,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 120 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-15 10:58:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-15 10:58:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-12-15 10:58:02,537 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 45 [2021-12-15 10:58:02,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:02,538 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-12-15 10:58:02,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-12-15 10:58:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 10:58:02,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:02,538 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:02,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-15 10:58:02,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:02,754 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1695567009, now seen corresponding path program 12 times [2021-12-15 10:58:02,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:02,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165269649] [2021-12-15 10:58:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:02,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:03,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165269649] [2021-12-15 10:58:03,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165269649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:03,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545557203] [2021-12-15 10:58:03,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:58:03,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:03,061 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-15 10:58:03,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-15 10:58:03,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-15 10:58:03,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:03,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:03,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545557203] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:03,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:03,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2021-12-15 10:58:03,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937469610] [2021-12-15 10:58:03,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:03,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-15 10:58:03,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:03,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-15 10:58:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1891, Unknown=0, NotChecked=0, Total=2352 [2021-12-15 10:58:03,939 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:04,318 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-12-15 10:58:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 10:58:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 10:58:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:04,319 INFO L225 Difference]: With dead ends: 77 [2021-12-15 10:58:04,319 INFO L226 Difference]: Without dead ends: 71 [2021-12-15 10:58:04,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 10:58:04,320 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 197 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:04,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:58:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-15 10:58:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-12-15 10:58:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:04,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-12-15 10:58:04,326 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 45 [2021-12-15 10:58:04,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:04,326 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-12-15 10:58:04,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.061224489795918) internal successors, (101), 49 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:04,327 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-12-15 10:58:04,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 10:58:04,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:04,327 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:04,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:04,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-15 10:58:04,543 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1371385919, now seen corresponding path program 13 times [2021-12-15 10:58:04,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:04,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493196490] [2021-12-15 10:58:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:04,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:04,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493196490] [2021-12-15 10:58:04,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493196490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:04,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899141928] [2021-12-15 10:58:04,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:58:04,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:04,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:04,885 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:04,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-15 10:58:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:04,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 10:58:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:05,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:05,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899141928] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:05,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:05,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 56 [2021-12-15 10:58:05,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094977451] [2021-12-15 10:58:05,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:05,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-15 10:58:05,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:05,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-15 10:58:05,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=2529, Unknown=0, NotChecked=0, Total=3080 [2021-12-15 10:58:05,965 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:06,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:06,860 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2021-12-15 10:58:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 10:58:06,860 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 10:58:06,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:06,861 INFO L225 Difference]: With dead ends: 133 [2021-12-15 10:58:06,861 INFO L226 Difference]: Without dead ends: 104 [2021-12-15 10:58:06,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1029, Invalid=4083, Unknown=0, NotChecked=0, Total=5112 [2021-12-15 10:58:06,863 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 274 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:06,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 111 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:58:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-15 10:58:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2021-12-15 10:58:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-12-15 10:58:06,876 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2021-12-15 10:58:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:06,876 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-12-15 10:58:06,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-12-15 10:58:06,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 10:58:06,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:06,877 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:06,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:07,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:07,077 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:07,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1311193347, now seen corresponding path program 13 times [2021-12-15 10:58:07,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:07,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501961284] [2021-12-15 10:58:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:07,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:07,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:07,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501961284] [2021-12-15 10:58:07,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501961284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:07,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701100922] [2021-12-15 10:58:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:58:07,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:07,446 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:07,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-15 10:58:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:07,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 10:58:07,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:08,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:08,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701100922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:08,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:08,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 55 [2021-12-15 10:58:08,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067179316] [2021-12-15 10:58:08,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:08,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-15 10:58:08,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-15 10:58:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=2420, Unknown=0, NotChecked=0, Total=2970 [2021-12-15 10:58:08,432 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:08,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:08,952 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-15 10:58:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 10:58:08,952 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 10:58:08,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:08,952 INFO L225 Difference]: With dead ends: 95 [2021-12-15 10:58:08,952 INFO L226 Difference]: Without dead ends: 89 [2021-12-15 10:58:08,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1183, Invalid=3509, Unknown=0, NotChecked=0, Total=4692 [2021-12-15 10:58:08,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 287 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:08,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 93 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-15 10:58:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2021-12-15 10:58:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-12-15 10:58:08,963 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 47 [2021-12-15 10:58:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:08,963 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-12-15 10:58:08,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-12-15 10:58:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 10:58:08,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:08,964 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:09,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:09,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:09,164 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:09,164 INFO L85 PathProgramCache]: Analyzing trace with hash 417676127, now seen corresponding path program 14 times [2021-12-15 10:58:09,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:09,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217221197] [2021-12-15 10:58:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:09,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:09,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:09,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217221197] [2021-12-15 10:58:09,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217221197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:09,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190651599] [2021-12-15 10:58:09,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:58:09,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:09,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:09,472 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:09,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-15 10:58:09,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:58:09,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:09,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 10:58:09,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:10,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190651599] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:10,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:10,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2021-12-15 10:58:10,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362810853] [2021-12-15 10:58:10,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:10,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-15 10:58:10,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-15 10:58:10,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2314, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 10:58:10,502 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:11,078 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-12-15 10:58:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-15 10:58:11,078 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 10:58:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:11,079 INFO L225 Difference]: With dead ends: 103 [2021-12-15 10:58:11,079 INFO L226 Difference]: Without dead ends: 74 [2021-12-15 10:58:11,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=936, Invalid=3486, Unknown=0, NotChecked=0, Total=4422 [2021-12-15 10:58:11,080 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:11,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 52 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:58:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-15 10:58:11,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-12-15 10:58:11,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-12-15 10:58:11,087 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 49 [2021-12-15 10:58:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:11,087 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-12-15 10:58:11,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-12-15 10:58:11,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 10:58:11,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:11,088 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:11,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-12-15 10:58:11,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:11,304 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:11,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:11,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1748746815, now seen corresponding path program 14 times [2021-12-15 10:58:11,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464318883] [2021-12-15 10:58:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:11,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:11,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:11,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464318883] [2021-12-15 10:58:11,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464318883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:11,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797748446] [2021-12-15 10:58:11,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 10:58:11,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:11,664 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:11,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-15 10:58:11,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 10:58:11,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:11,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-15 10:58:11,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:12,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:12,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797748446] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:12,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:12,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 54 [2021-12-15 10:58:12,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226468724] [2021-12-15 10:58:12,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:12,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-15 10:58:12,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:12,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-15 10:58:12,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2021-12-15 10:58:12,597 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:13,044 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-12-15 10:58:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 10:58:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 10:58:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:13,045 INFO L225 Difference]: With dead ends: 83 [2021-12-15 10:58:13,045 INFO L226 Difference]: Without dead ends: 77 [2021-12-15 10:58:13,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2021-12-15 10:58:13,046 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 185 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:13,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 60 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-15 10:58:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-12-15 10:58:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-15 10:58:13,053 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 49 [2021-12-15 10:58:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:13,053 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-15 10:58:13,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-15 10:58:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 10:58:13,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:13,054 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:13,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:13,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-15 10:58:13,267 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:13,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1489381025, now seen corresponding path program 15 times [2021-12-15 10:58:13,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:13,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455519554] [2021-12-15 10:58:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:13,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:13,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455519554] [2021-12-15 10:58:13,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455519554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609234181] [2021-12-15 10:58:13,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:58:13,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:13,683 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:13,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-15 10:58:13,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-15 10:58:13,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 10:58:13,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:14,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:14,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609234181] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:14,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:14,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 61 [2021-12-15 10:58:14,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028128204] [2021-12-15 10:58:14,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:14,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-15 10:58:14,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-15 10:58:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3007, Unknown=0, NotChecked=0, Total=3660 [2021-12-15 10:58:14,926 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:15,944 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-12-15 10:58:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-15 10:58:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 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 [2021-12-15 10:58:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:15,945 INFO L225 Difference]: With dead ends: 143 [2021-12-15 10:58:15,945 INFO L226 Difference]: Without dead ends: 112 [2021-12-15 10:58:15,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1200, Invalid=4806, Unknown=0, NotChecked=0, Total=6006 [2021-12-15 10:58:15,946 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 274 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:15,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 114 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-15 10:58:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2021-12-15 10:58:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-12-15 10:58:15,959 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 51 [2021-12-15 10:58:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:15,959 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-12-15 10:58:15,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-12-15 10:58:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 10:58:15,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:15,959 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:15,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-15 10:58:16,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-15 10:58:16,160 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:16,160 INFO L85 PathProgramCache]: Analyzing trace with hash 978060893, now seen corresponding path program 15 times [2021-12-15 10:58:16,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:16,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871961170] [2021-12-15 10:58:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:16,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:16,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871961170] [2021-12-15 10:58:16,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871961170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:16,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059729508] [2021-12-15 10:58:16,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 10:58:16,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:16,599 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:16,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-15 10:58:16,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-15 10:58:16,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:16,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 10:58:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:17,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:17,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059729508] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:17,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:17,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 60 [2021-12-15 10:58:17,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991396951] [2021-12-15 10:58:17,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:17,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-15 10:58:17,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-15 10:58:17,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2887, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 10:58:17,699 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:18,283 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-12-15 10:58:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 10:58:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 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 [2021-12-15 10:58:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:18,284 INFO L225 Difference]: With dead ends: 101 [2021-12-15 10:58:18,284 INFO L226 Difference]: Without dead ends: 95 [2021-12-15 10:58:18,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1396, Invalid=4154, Unknown=0, NotChecked=0, Total=5550 [2021-12-15 10:58:18,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:18,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 113 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-15 10:58:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-12-15 10:58:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-12-15 10:58:18,293 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 51 [2021-12-15 10:58:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:18,293 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-12-15 10:58:18,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-12-15 10:58:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 10:58:18,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:18,293 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:18,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-15 10:58:18,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:18,494 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:18,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1367745215, now seen corresponding path program 16 times [2021-12-15 10:58:18,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:18,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176456281] [2021-12-15 10:58:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:18,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:18,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:18,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176456281] [2021-12-15 10:58:18,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176456281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:18,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581930774] [2021-12-15 10:58:18,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:58:18,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:18,866 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:18,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-15 10:58:18,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:58:18,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 10:58:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:19,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:19,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581930774] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:19,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:19,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2021-12-15 10:58:19,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83713741] [2021-12-15 10:58:19,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:19,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-15 10:58:19,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-15 10:58:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2771, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 10:58:19,993 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:20,657 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-12-15 10:58:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-15 10:58:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 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 [2021-12-15 10:58:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:20,658 INFO L225 Difference]: With dead ends: 111 [2021-12-15 10:58:20,658 INFO L226 Difference]: Without dead ends: 80 [2021-12-15 10:58:20,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1103, Invalid=4153, Unknown=0, NotChecked=0, Total=5256 [2021-12-15 10:58:20,658 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:20,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 105 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 10:58:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-15 10:58:20,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-15 10:58:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-12-15 10:58:20,666 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 53 [2021-12-15 10:58:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:20,667 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-12-15 10:58:20,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-12-15 10:58:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 10:58:20,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:20,667 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:20,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:20,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-15 10:58:20,868 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1146738145, now seen corresponding path program 16 times [2021-12-15 10:58:20,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:20,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515234867] [2021-12-15 10:58:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:20,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:21,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515234867] [2021-12-15 10:58:21,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515234867] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:21,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929539441] [2021-12-15 10:58:21,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 10:58:21,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:21,292 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:21,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-15 10:58:21,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 10:58:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:21,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-15 10:58:21,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:21,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:22,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929539441] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:22,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:22,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 59 [2021-12-15 10:58:22,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543025603] [2021-12-15 10:58:22,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:22,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-15 10:58:22,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-15 10:58:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2021-12-15 10:58:22,369 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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) [2021-12-15 10:58:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:22,843 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-12-15 10:58:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-15 10:58:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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) Word has length 53 [2021-12-15 10:58:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:22,844 INFO L225 Difference]: With dead ends: 89 [2021-12-15 10:58:22,844 INFO L226 Difference]: Without dead ends: 83 [2021-12-15 10:58:22,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1330, Invalid=3782, Unknown=0, NotChecked=0, Total=5112 [2021-12-15 10:58:22,845 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 248 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:22,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 62 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:22,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-15 10:58:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2021-12-15 10:58:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-12-15 10:58:22,853 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 53 [2021-12-15 10:58:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:22,853 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-12-15 10:58:22,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 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) [2021-12-15 10:58:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-12-15 10:58:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 10:58:22,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:22,854 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:22,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-15 10:58:23,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-15 10:58:23,054 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:23,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2067142273, now seen corresponding path program 17 times [2021-12-15 10:58:23,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:23,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843357640] [2021-12-15 10:58:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:23,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:23,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:23,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843357640] [2021-12-15 10:58:23,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843357640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:23,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133122048] [2021-12-15 10:58:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:58:23,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:23,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:23,504 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:23,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-15 10:58:23,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-15 10:58:23,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:23,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 10:58:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:24,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:24,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133122048] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:24,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:24,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 66 [2021-12-15 10:58:24,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293202837] [2021-12-15 10:58:24,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:24,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-15 10:58:24,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-15 10:58:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=3526, Unknown=0, NotChecked=0, Total=4290 [2021-12-15 10:58:24,874 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:26,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:26,044 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-12-15 10:58:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-15 10:58:26,045 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 10:58:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:26,045 INFO L225 Difference]: With dead ends: 153 [2021-12-15 10:58:26,045 INFO L226 Difference]: Without dead ends: 120 [2021-12-15 10:58:26,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1385, Invalid=5587, Unknown=0, NotChecked=0, Total=6972 [2021-12-15 10:58:26,046 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 253 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:26,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 174 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-15 10:58:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-12-15 10:58:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-12-15 10:58:26,055 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 55 [2021-12-15 10:58:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:26,055 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-12-15 10:58:26,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-12-15 10:58:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 10:58:26,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:26,055 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:26,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-15 10:58:26,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-15 10:58:26,256 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2087927485, now seen corresponding path program 17 times [2021-12-15 10:58:26,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:26,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740067687] [2021-12-15 10:58:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:26,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 81 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:26,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740067687] [2021-12-15 10:58:26,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740067687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054996892] [2021-12-15 10:58:26,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 10:58:26,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:26,713 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:26,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-15 10:58:26,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-15 10:58:26,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-15 10:58:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:27,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:27,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054996892] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:27,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:27,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 65 [2021-12-15 10:58:27,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356552911] [2021-12-15 10:58:27,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:27,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-15 10:58:27,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-15 10:58:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3395, Unknown=0, NotChecked=0, Total=4160 [2021-12-15 10:58:27,936 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:28,568 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2021-12-15 10:58:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-15 10:58:28,568 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 10:58:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:28,569 INFO L225 Difference]: With dead ends: 107 [2021-12-15 10:58:28,569 INFO L226 Difference]: Without dead ends: 101 [2021-12-15 10:58:28,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2620 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1627, Invalid=4853, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 10:58:28,569 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 294 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:28,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 108 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-15 10:58:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-12-15 10:58:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-12-15 10:58:28,579 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 55 [2021-12-15 10:58:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:28,579 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-12-15 10:58:28,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-12-15 10:58:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 10:58:28,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:28,580 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:28,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-12-15 10:58:28,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:28,780 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:28,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1497316577, now seen corresponding path program 18 times [2021-12-15 10:58:28,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:28,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191996755] [2021-12-15 10:58:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:28,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:29,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:29,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191996755] [2021-12-15 10:58:29,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191996755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:29,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022321932] [2021-12-15 10:58:29,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:58:29,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:29,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:29,217 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:29,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-15 10:58:29,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-15 10:58:29,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:29,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 10:58:29,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:30,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:30,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022321932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:30,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:30,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2021-12-15 10:58:30,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616223971] [2021-12-15 10:58:30,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:30,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-15 10:58:30,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:30,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-15 10:58:30,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=763, Invalid=3269, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 10:58:30,506 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:31,264 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-12-15 10:58:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-15 10:58:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 10:58:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:31,265 INFO L225 Difference]: With dead ends: 119 [2021-12-15 10:58:31,265 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 10:58:31,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1284, Invalid=4878, Unknown=0, NotChecked=0, Total=6162 [2021-12-15 10:58:31,266 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:31,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 111 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 10:58:31,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-12-15 10:58:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-12-15 10:58:31,276 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 57 [2021-12-15 10:58:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:31,276 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-12-15 10:58:31,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:31,277 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-12-15 10:58:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 10:58:31,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:31,277 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:31,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:31,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:31,491 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:31,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:31,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1622398209, now seen corresponding path program 18 times [2021-12-15 10:58:31,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:31,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205676106] [2021-12-15 10:58:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:31,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:31,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205676106] [2021-12-15 10:58:31,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205676106] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747097341] [2021-12-15 10:58:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 10:58:31,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:31,954 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:31,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-15 10:58:31,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-15 10:58:31,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 10:58:31,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-15 10:58:32,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:58:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:32,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 10:58:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:33,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747097341] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 10:58:33,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 10:58:33,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 64 [2021-12-15 10:58:33,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461990797] [2021-12-15 10:58:33,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 10:58:33,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-15 10:58:33,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:58:33,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-15 10:58:33,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=3259, Unknown=0, NotChecked=0, Total=4032 [2021-12-15 10:58:33,194 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:58:33,719 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-15 10:58:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-15 10:58:33,719 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 10:58:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:58:33,720 INFO L225 Difference]: With dead ends: 95 [2021-12-15 10:58:33,720 INFO L226 Difference]: Without dead ends: 89 [2021-12-15 10:58:33,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1557, Invalid=4449, Unknown=0, NotChecked=0, Total=6006 [2021-12-15 10:58:33,721 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 210 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:58:33,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 65 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 10:58:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-15 10:58:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-12-15 10:58:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2021-12-15 10:58:33,731 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 57 [2021-12-15 10:58:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:58:33,732 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2021-12-15 10:58:33,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 10:58:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2021-12-15 10:58:33,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 10:58:33,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:58:33,733 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:58:33,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-12-15 10:58:33,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-15 10:58:33,949 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:58:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:58:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash 224354145, now seen corresponding path program 19 times [2021-12-15 10:58:33,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:58:33,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189835996] [2021-12-15 10:58:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:58:33,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:58:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 100 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:58:34,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:58:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189835996] [2021-12-15 10:58:34,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189835996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:58:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604480725] [2021-12-15 10:58:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 10:58:34,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:58:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:58:34,414 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:58:34,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-15 10:58:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:58:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-15 10:58:34,445 INFO L286 TraceCheckSpWp]: Computing forward predicates...