./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/nla-digbench-scaling/hard-ll_valuebound50.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 a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:16:08,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:16:08,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:16:08,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:16:08,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:16:08,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:16:08,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:16:08,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:16:08,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:16:08,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:16:08,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:16:08,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:16:08,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:16:08,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:16:08,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:16:08,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:16:08,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:16:08,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:16:08,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:16:08,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:16:08,184 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:16:08,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:16:08,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:16:08,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:16:08,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:16:08,196 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:16:08,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:16:08,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:16:08,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:16:08,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:16:08,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:16:08,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:16:08,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:16:08,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:16:08,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:16:08,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:16:08,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:16:08,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:16:08,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:16:08,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:16:08,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:16:08,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:16:08,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:16:08,246 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:16:08,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:16:08,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:16:08,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:16:08,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:16:08,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:16:08,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:16:08,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:16:08,249 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:16:08,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:16:08,250 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:16:08,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:16:08,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:16:08,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:16:08,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:16:08,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:16:08,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:16:08,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:16:08,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:16:08,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:16:08,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:16:08,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:16:08,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:16:08,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:16:08,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:16:08,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:16:08,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:16:08,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:16:08,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:16:08,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:16:08,255 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:16:08,255 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:16:08,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:16:08,255 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f [2022-07-22 16:16:08,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:16:08,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:16:08,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:16:08,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:16:08,539 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:16:08,540 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2022-07-22 16:16:08,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46a4ab528/0ac7ce9a8cc3462084a9339337f8066f/FLAGc0219904b [2022-07-22 16:16:08,992 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:16:08,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2022-07-22 16:16:08,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46a4ab528/0ac7ce9a8cc3462084a9339337f8066f/FLAGc0219904b [2022-07-22 16:16:09,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46a4ab528/0ac7ce9a8cc3462084a9339337f8066f [2022-07-22 16:16:09,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:16:09,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:16:09,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:16:09,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:16:09,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:16:09,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ef2361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09, skipping insertion in model container [2022-07-22 16:16:09,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:16:09,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:16:09,176 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/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2022-07-22 16:16:09,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:16:09,215 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:16:09,229 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/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2022-07-22 16:16:09,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:16:09,255 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:16:09,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09 WrapperNode [2022-07-22 16:16:09,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:16:09,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:16:09,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:16:09,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:16:09,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,293 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 55 [2022-07-22 16:16:09,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:16:09,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:16:09,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:16:09,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:16:09,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:16:09,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:16:09,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:16:09,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:16:09,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (1/1) ... [2022-07-22 16:16:09,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:16:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:09,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 16:16:09,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 16:16:09,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:16:09,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 16:16:09,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 16:16:09,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:16:09,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:16:09,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:16:09,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:16:09,377 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:16:09,419 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:16:09,421 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:16:09,523 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:16:09,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:16:09,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 16:16:09,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:16:09 BoogieIcfgContainer [2022-07-22 16:16:09,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:16:09,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:16:09,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:16:09,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:16:09,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:16:09" (1/3) ... [2022-07-22 16:16:09,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1ae434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:16:09, skipping insertion in model container [2022-07-22 16:16:09,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:16:09" (2/3) ... [2022-07-22 16:16:09,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1ae434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:16:09, skipping insertion in model container [2022-07-22 16:16:09,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:16:09" (3/3) ... [2022-07-22 16:16:09,538 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2022-07-22 16:16:09,551 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:16:09,551 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:16:09,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:16:09,599 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3de7ca4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@12016b88 [2022-07-22 16:16:09,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:16:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 16:16:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 16:16:09,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:09,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:09,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash -487550744, now seen corresponding path program 1 times [2022-07-22 16:16:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:09,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609800023] [2022-07-22 16:16:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:09,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:16:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:09,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:16:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:09,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:16:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:16:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609800023] [2022-07-22 16:16:09,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609800023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:16:09,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:16:09,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:16:09,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969460075] [2022-07-22 16:16:09,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:09,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:16:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:16:09,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:16:09,844 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 16:16:09,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:09,875 INFO L93 Difference]: Finished difference Result 63 states and 104 transitions. [2022-07-22 16:16:09,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:16:09,879 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-07-22 16:16:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:09,885 INFO L225 Difference]: With dead ends: 63 [2022-07-22 16:16:09,885 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 16:16:09,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:16:09,894 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:09,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:16:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 16:16:09,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-22 16:16:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 16:16:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-07-22 16:16:09,963 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 24 [2022-07-22 16:16:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:09,964 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-07-22 16:16:09,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 16:16:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-07-22 16:16:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 16:16:09,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:09,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:16:09,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:09,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1636258074, now seen corresponding path program 1 times [2022-07-22 16:16:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:09,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118264763] [2022-07-22 16:16:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:09,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:16:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:16:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:16:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:16:10,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:10,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118264763] [2022-07-22 16:16:10,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118264763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:16:10,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:16:10,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:16:10,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026094389] [2022-07-22 16:16:10,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:10,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:16:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:10,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:16:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:10,159 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:16:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:10,252 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-07-22 16:16:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:16:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-07-22 16:16:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:10,256 INFO L225 Difference]: With dead ends: 42 [2022-07-22 16:16:10,257 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 16:16:10,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:16:10,258 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:10,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 128 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:16:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 16:16:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-07-22 16:16:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 16:16:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-22 16:16:10,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 24 [2022-07-22 16:16:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:10,270 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-22 16:16:10,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:16:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-22 16:16:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-22 16:16:10,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:10,272 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:10,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 16:16:10,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:10,273 INFO L85 PathProgramCache]: Analyzing trace with hash 906849917, now seen corresponding path program 1 times [2022-07-22 16:16:10,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:10,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580662782] [2022-07-22 16:16:10,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:10,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 16:16:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 16:16:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-22 16:16:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-22 16:16:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:16:10,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:10,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580662782] [2022-07-22 16:16:10,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580662782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:16:10,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:16:10,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:16:10,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860710746] [2022-07-22 16:16:10,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:10,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:16:10,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:10,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:16:10,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:10,387 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 16:16:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:10,439 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-07-22 16:16:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 16:16:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-22 16:16:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:10,448 INFO L225 Difference]: With dead ends: 46 [2022-07-22 16:16:10,448 INFO L226 Difference]: Without dead ends: 44 [2022-07-22 16:16:10,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:16:10,454 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:10,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:16:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-22 16:16:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-07-22 16:16:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 16:16:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-22 16:16:10,470 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2022-07-22 16:16:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:10,471 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-22 16:16:10,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 16:16:10,472 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-22 16:16:10,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 16:16:10,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:10,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:10,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 16:16:10,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:10,476 INFO L85 PathProgramCache]: Analyzing trace with hash 710995206, now seen corresponding path program 1 times [2022-07-22 16:16:10,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:10,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501156567] [2022-07-22 16:16:10,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:10,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:10,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568907798] [2022-07-22 16:16:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:10,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:10,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:10,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:16:10,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:16:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:16:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 16:16:10,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:16:10,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:10,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501156567] [2022-07-22 16:16:10,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:10,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568907798] [2022-07-22 16:16:10,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568907798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:16:10,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:16:10,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:16:10,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121468206] [2022-07-22 16:16:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:10,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:16:10,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:16:10,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:10,754 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 16:16:10,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:10,823 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-07-22 16:16:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:16:10,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-07-22 16:16:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:10,825 INFO L225 Difference]: With dead ends: 65 [2022-07-22 16:16:10,825 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 16:16:10,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:16:10,826 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:10,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 129 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:16:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 16:16:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-22 16:16:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 16:16:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-07-22 16:16:10,837 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 34 [2022-07-22 16:16:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:10,838 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-07-22 16:16:10,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 16:16:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-07-22 16:16:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 16:16:10,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:10,839 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:10,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 16:16:11,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:11,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:11,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1829555286, now seen corresponding path program 1 times [2022-07-22 16:16:11,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:11,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454851909] [2022-07-22 16:16:11,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:11,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:11,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946119464] [2022-07-22 16:16:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:11,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:11,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:11,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:16:11,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:16:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 16:16:11,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 16:16:11,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:16:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 16:16:11,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454851909] [2022-07-22 16:16:11,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:11,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946119464] [2022-07-22 16:16:11,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946119464] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:16:11,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:16:11,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-22 16:16:11,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195640586] [2022-07-22 16:16:11,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:11,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 16:16:11,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:11,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 16:16:11,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:16:11,595 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:16:11,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:11,679 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2022-07-22 16:16:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:16:11,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2022-07-22 16:16:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:11,683 INFO L225 Difference]: With dead ends: 64 [2022-07-22 16:16:11,683 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 16:16:11,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:16:11,685 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:11,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:16:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 16:16:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-07-22 16:16:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 16:16:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2022-07-22 16:16:11,708 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 41 [2022-07-22 16:16:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:11,710 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2022-07-22 16:16:11,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:16:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2022-07-22 16:16:11,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 16:16:11,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:11,715 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:11,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 16:16:11,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:11,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 105343995, now seen corresponding path program 1 times [2022-07-22 16:16:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187648509] [2022-07-22 16:16:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:11,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:11,950 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:11,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577784439] [2022-07-22 16:16:11,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:11,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:11,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:11,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:16:11,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:16:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 16:16:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-22 16:16:12,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:16:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-22 16:16:12,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:12,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187648509] [2022-07-22 16:16:12,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:12,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577784439] [2022-07-22 16:16:12,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577784439] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 16:16:12,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:16:12,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-07-22 16:16:12,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80536932] [2022-07-22 16:16:12,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:12,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:16:12,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:16:12,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:16:12,263 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:16:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:12,325 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2022-07-22 16:16:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:16:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-07-22 16:16:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:12,326 INFO L225 Difference]: With dead ends: 72 [2022-07-22 16:16:12,326 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 16:16:12,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:16:12,328 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:12,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:16:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 16:16:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-07-22 16:16:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 16:16:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2022-07-22 16:16:12,337 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 51 [2022-07-22 16:16:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:12,338 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2022-07-22 16:16:12,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 16:16:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2022-07-22 16:16:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 16:16:12,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:12,339 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:12,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 16:16:12,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:12,554 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:12,555 INFO L85 PathProgramCache]: Analyzing trace with hash 957489548, now seen corresponding path program 1 times [2022-07-22 16:16:12,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:12,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501476599] [2022-07-22 16:16:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:12,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:12,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460586705] [2022-07-22 16:16:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:12,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:12,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:12,567 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) [2022-07-22 16:16:12,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:16:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:16:12,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-22 16:16:12,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:16:12,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501476599] [2022-07-22 16:16:12,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460586705] [2022-07-22 16:16:12,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460586705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:16:12,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:16:12,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:16:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061847312] [2022-07-22 16:16:12,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:16:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:16:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:12,680 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 16:16:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:12,744 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-07-22 16:16:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:16:12,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-07-22 16:16:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:12,746 INFO L225 Difference]: With dead ends: 75 [2022-07-22 16:16:12,746 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 16:16:12,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:16:12,747 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:12,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:16:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 16:16:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-22 16:16:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 16:16:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2022-07-22 16:16:12,757 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 52 [2022-07-22 16:16:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:12,759 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2022-07-22 16:16:12,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 16:16:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2022-07-22 16:16:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 16:16:12,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:12,764 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:12,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:16:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:12,979 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:12,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1754894755, now seen corresponding path program 1 times [2022-07-22 16:16:12,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:12,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839586284] [2022-07-22 16:16:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:12,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:12,989 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:12,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278192755] [2022-07-22 16:16:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:12,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:12,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:12,991 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) [2022-07-22 16:16:13,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:16:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 16:16:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 16:16:13,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:16:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 16:16:14,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839586284] [2022-07-22 16:16:14,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:14,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278192755] [2022-07-22 16:16:14,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278192755] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:16:14,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:16:14,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-07-22 16:16:14,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140373874] [2022-07-22 16:16:14,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:16:14,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:16:14,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:16:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:16:14,941 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:16:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:26,373 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-07-22 16:16:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 16:16:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 71 [2022-07-22 16:16:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:26,378 INFO L225 Difference]: With dead ends: 165 [2022-07-22 16:16:26,378 INFO L226 Difference]: Without dead ends: 138 [2022-07-22 16:16:26,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-07-22 16:16:26,379 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 61 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:26,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 214 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-07-22 16:16:26,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-22 16:16:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 102. [2022-07-22 16:16:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-22 16:16:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 129 transitions. [2022-07-22 16:16:26,399 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 129 transitions. Word has length 71 [2022-07-22 16:16:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:26,399 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 129 transitions. [2022-07-22 16:16:26,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-07-22 16:16:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 129 transitions. [2022-07-22 16:16:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 16:16:26,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:26,401 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:26,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 16:16:26,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:26,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:26,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1620227847, now seen corresponding path program 1 times [2022-07-22 16:16:26,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:26,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948795670] [2022-07-22 16:16:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:26,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:26,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:26,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20679312] [2022-07-22 16:16:26,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:26,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:26,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:26,614 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) [2022-07-22 16:16:26,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:16:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:26,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 16:16:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-07-22 16:16:27,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:16:28,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:28,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948795670] [2022-07-22 16:16:28,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:28,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20679312] [2022-07-22 16:16:28,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20679312] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:16:28,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:16:28,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-22 16:16:28,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328434360] [2022-07-22 16:16:28,783 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:16:28,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 16:16:28,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:28,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 16:16:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:16:28,784 INFO L87 Difference]: Start difference. First operand 102 states and 129 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-22 16:16:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:29,681 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2022-07-22 16:16:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:16:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-07-22 16:16:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:29,683 INFO L225 Difference]: With dead ends: 136 [2022-07-22 16:16:29,683 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 16:16:29,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-07-22 16:16:29,685 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:29,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 211 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 16:16:29,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 16:16:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-07-22 16:16:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-22 16:16:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-07-22 16:16:29,696 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 82 [2022-07-22 16:16:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:29,697 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-07-22 16:16:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-07-22 16:16:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-07-22 16:16:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 16:16:29,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:29,698 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:29,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:16:29,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:29,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1888027627, now seen corresponding path program 2 times [2022-07-22 16:16:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:29,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006424870] [2022-07-22 16:16:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:29,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:29,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727576111] [2022-07-22 16:16:29,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:16:29,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:29,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:29,927 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) [2022-07-22 16:16:29,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:16:29,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:16:29,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:16:29,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:16:29,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 16:16:30,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:16:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-22 16:16:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006424870] [2022-07-22 16:16:30,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727576111] [2022-07-22 16:16:30,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727576111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:16:30,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:16:30,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-07-22 16:16:30,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330294825] [2022-07-22 16:16:30,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:16:30,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:16:30,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:16:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:30,107 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-22 16:16:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:30,196 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2022-07-22 16:16:30,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 16:16:30,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 84 [2022-07-22 16:16:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:30,198 INFO L225 Difference]: With dead ends: 121 [2022-07-22 16:16:30,198 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 16:16:30,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:30,199 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:30,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:16:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 16:16:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-22 16:16:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-22 16:16:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 122 transitions. [2022-07-22 16:16:30,211 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 122 transitions. Word has length 84 [2022-07-22 16:16:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:30,211 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 122 transitions. [2022-07-22 16:16:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2022-07-22 16:16:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 122 transitions. [2022-07-22 16:16:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 16:16:30,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:30,213 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:30,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 16:16:30,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:30,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1729716470, now seen corresponding path program 1 times [2022-07-22 16:16:30,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:30,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63072438] [2022-07-22 16:16:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:30,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:30,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694084421] [2022-07-22 16:16:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:30,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:30,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:30,440 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) [2022-07-22 16:16:30,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:16:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:30,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:16:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-07-22 16:16:30,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:16:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-07-22 16:16:30,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63072438] [2022-07-22 16:16:30,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694084421] [2022-07-22 16:16:30,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694084421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:16:30,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:16:30,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-07-22 16:16:30,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75112084] [2022-07-22 16:16:30,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:16:30,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 16:16:30,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 16:16:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:16:30,903 INFO L87 Difference]: Start difference. First operand 99 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-07-22 16:16:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:31,213 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2022-07-22 16:16:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:16:31,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 87 [2022-07-22 16:16:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:31,214 INFO L225 Difference]: With dead ends: 107 [2022-07-22 16:16:31,214 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 16:16:31,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:16:31,215 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:31,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 268 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 16:16:31,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 16:16:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-22 16:16:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 16:16:31,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-07-22 16:16:31,225 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 87 [2022-07-22 16:16:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:31,225 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-07-22 16:16:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-07-22 16:16:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-07-22 16:16:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 16:16:31,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:31,226 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:31,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 16:16:31,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 16:16:31,432 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash -219918921, now seen corresponding path program 1 times [2022-07-22 16:16:31,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:31,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938881114] [2022-07-22 16:16:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:31,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:31,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307883079] [2022-07-22 16:16:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:31,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:31,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:31,444 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) [2022-07-22 16:16:31,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:16:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:16:31,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 16:16:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-07-22 16:16:31,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:16:31,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:16:31,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938881114] [2022-07-22 16:16:31,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:16:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307883079] [2022-07-22 16:16:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307883079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:16:31,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:16:31,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:16:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469543528] [2022-07-22 16:16:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:16:31,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:16:31,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:16:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:16:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:31,564 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-22 16:16:31,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:16:31,647 INFO L93 Difference]: Finished difference Result 97 states and 114 transitions. [2022-07-22 16:16:31,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:16:31,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2022-07-22 16:16:31,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:16:31,649 INFO L225 Difference]: With dead ends: 97 [2022-07-22 16:16:31,649 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 16:16:31,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:16:31,650 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:16:31,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 110 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:16:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 16:16:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-07-22 16:16:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-22 16:16:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2022-07-22 16:16:31,665 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 91 [2022-07-22 16:16:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:16:31,666 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2022-07-22 16:16:31,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-22 16:16:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2022-07-22 16:16:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 16:16:31,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:16:31,667 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:16:31,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:16:31,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:31,886 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:16:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:16:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2103086134, now seen corresponding path program 3 times [2022-07-22 16:16:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:16:31,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440845001] [2022-07-22 16:16:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:16:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:16:31,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:16:31,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938339578] [2022-07-22 16:16:31,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:16:31,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:16:31,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:16:31,902 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) [2022-07-22 16:16:31,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:16:31,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:16:31,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:16:31,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 16:16:31,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:16:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 46 proven. 46 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-22 16:16:32,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:17:57,639 WARN L233 SmtUtils]: Spent 29.28s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:18:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 40 proven. 45 refuted. 1 times theorem prover too weak. 288 trivial. 0 not checked. [2022-07-22 16:18:47,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:18:47,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440845001] [2022-07-22 16:18:47,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:18:47,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938339578] [2022-07-22 16:18:47,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938339578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:18:47,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:18:47,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 23 [2022-07-22 16:18:47,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52413715] [2022-07-22 16:18:47,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:18:47,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 16:18:47,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:18:47,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 16:18:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=417, Unknown=5, NotChecked=0, Total=506 [2022-07-22 16:18:47,180 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-22 16:19:01,187 WARN L233 SmtUtils]: Spent 10.77s on a formula simplification. DAG size of input: 189 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:19:07,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:19:09,802 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:19:11,545 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:19:18,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:19:27,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:19:28,824 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:19:31,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:19:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:19:31,776 INFO L93 Difference]: Finished difference Result 159 states and 206 transitions. [2022-07-22 16:19:31,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 16:19:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) Word has length 101 [2022-07-22 16:19:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:19:31,778 INFO L225 Difference]: With dead ends: 159 [2022-07-22 16:19:31,778 INFO L226 Difference]: Without dead ends: 131 [2022-07-22 16:19:31,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 175 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 64.9s TimeCoverageRelationStatistics Valid=176, Invalid=809, Unknown=7, NotChecked=0, Total=992 [2022-07-22 16:19:31,779 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 201 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2022-07-22 16:19:31,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 220 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1060 Invalid, 4 Unknown, 0 Unchecked, 25.4s Time] [2022-07-22 16:19:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-22 16:19:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2022-07-22 16:19:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 77 states have internal predecessors, (81), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-22 16:19:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2022-07-22 16:19:31,794 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 101 [2022-07-22 16:19:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:19:31,795 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2022-07-22 16:19:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 21 states have internal predecessors, (48), 11 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-22 16:19:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2022-07-22 16:19:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 16:19:31,797 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:19:31,797 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:19:31,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 16:19:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 16:19:32,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:19:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:19:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1168936300, now seen corresponding path program 2 times [2022-07-22 16:19:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:19:32,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820073148] [2022-07-22 16:19:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:19:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:19:32,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:19:32,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797042856] [2022-07-22 16:19:32,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:19:32,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:19:32,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:19:32,041 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) [2022-07-22 16:19:32,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 16:19:32,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:19:32,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:19:32,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 16:19:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:19:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 67 proven. 69 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-07-22 16:19:34,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:19:37,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:19:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820073148] [2022-07-22 16:19:37,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:19:37,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797042856] [2022-07-22 16:19:37,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797042856] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:19:37,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:19:37,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-22 16:19:37,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478095835] [2022-07-22 16:19:37,904 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:19:37,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 16:19:37,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:19:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 16:19:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-22 16:19:37,906 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-22 16:19:43,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:19:43,447 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2022-07-22 16:19:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 16:19:43,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 112 [2022-07-22 16:19:43,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:19:43,449 INFO L225 Difference]: With dead ends: 133 [2022-07-22 16:19:43,449 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 16:19:43,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-07-22 16:19:43,450 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:19:43,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 261 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-22 16:19:43,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 16:19:43,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-07-22 16:19:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 79 states have internal predecessors, (83), 36 states have call successors, (36), 13 states have call predecessors, (36), 13 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-22 16:19:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2022-07-22 16:19:43,472 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 112 [2022-07-22 16:19:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:19:43,473 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2022-07-22 16:19:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-22 16:19:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2022-07-22 16:19:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-22 16:19:43,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:19:43,475 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:19:43,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 16:19:43,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 16:19:43,701 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:19:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:19:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1560875064, now seen corresponding path program 4 times [2022-07-22 16:19:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:19:43,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939270106] [2022-07-22 16:19:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:19:43,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:19:43,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:19:43,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252514556] [2022-07-22 16:19:43,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 16:19:43,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:19:43,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:19:43,730 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) [2022-07-22 16:19:43,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 16:19:43,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 16:19:43,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:19:43,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:19:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:19:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-22 16:19:43,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:19:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-07-22 16:19:44,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:19:44,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939270106] [2022-07-22 16:19:44,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:19:44,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252514556] [2022-07-22 16:19:44,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252514556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:19:44,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:19:44,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-07-22 16:19:44,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538054305] [2022-07-22 16:19:44,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:19:44,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 16:19:44,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:19:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 16:19:44,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:19:44,060 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2022-07-22 16:19:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:19:44,198 INFO L93 Difference]: Finished difference Result 144 states and 177 transitions. [2022-07-22 16:19:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:19:44,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 114 [2022-07-22 16:19:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:19:44,208 INFO L225 Difference]: With dead ends: 144 [2022-07-22 16:19:44,208 INFO L226 Difference]: Without dead ends: 111 [2022-07-22 16:19:44,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:19:44,212 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:19:44,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 219 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:19:44,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-22 16:19:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-22 16:19:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 71 states have internal predecessors, (74), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 16:19:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2022-07-22 16:19:44,228 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 114 [2022-07-22 16:19:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:19:44,230 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2022-07-22 16:19:44,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2022-07-22 16:19:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2022-07-22 16:19:44,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 16:19:44,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:19:44,231 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:19:44,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 16:19:44,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 16:19:44,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:19:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:19:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash 546247585, now seen corresponding path program 3 times [2022-07-22 16:19:44,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:19:44,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309678747] [2022-07-22 16:19:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:19:44,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:19:44,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:19:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019343643] [2022-07-22 16:19:44,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:19:44,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:19:44,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:19:44,450 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) [2022-07-22 16:19:44,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 16:19:44,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:19:44,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:19:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 16:19:44,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:19:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-07-22 16:19:45,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:19:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2022-07-22 16:19:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:19:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309678747] [2022-07-22 16:19:46,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:19:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019343643] [2022-07-22 16:19:46,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019343643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:19:46,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:19:46,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-22 16:19:46,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056103423] [2022-07-22 16:19:46,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:19:46,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 16:19:46,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:19:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 16:19:46,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:19:46,405 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-22 16:19:56,711 WARN L233 SmtUtils]: Spent 10.14s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:20:00,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:20:20,230 WARN L233 SmtUtils]: Spent 16.27s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:20:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:20:20,298 INFO L93 Difference]: Finished difference Result 117 states and 138 transitions. [2022-07-22 16:20:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:20:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) Word has length 129 [2022-07-22 16:20:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:20:20,300 INFO L225 Difference]: With dead ends: 117 [2022-07-22 16:20:20,300 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 16:20:20,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:20:20,301 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:20:20,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 160 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 1 Unknown, 30 Unchecked, 3.1s Time] [2022-07-22 16:20:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 16:20:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-07-22 16:20:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 30 states have call successors, (30), 14 states have call predecessors, (30), 14 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 16:20:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2022-07-22 16:20:20,314 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 129 [2022-07-22 16:20:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:20:20,315 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2022-07-22 16:20:20,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-22 16:20:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2022-07-22 16:20:20,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 16:20:20,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:20:20,316 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:20:20,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 16:20:20,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 16:20:20,531 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:20:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:20:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1330691261, now seen corresponding path program 5 times [2022-07-22 16:20:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:20:20,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780243582] [2022-07-22 16:20:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:20:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:20:20,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:20:20,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263853457] [2022-07-22 16:20:20,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 16:20:20,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:20:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:20:20,547 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) [2022-07-22 16:20:20,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 16:20:20,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 16:20:20,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:20:20,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 16:20:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:20:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 183 proven. 120 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-07-22 16:20:21,914 INFO L328 TraceCheckSpWp]: Computing backward predicates...