./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/array-tiling/pr2.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 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:37:33,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:37:33,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:37:33,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:37:33,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:37:33,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:37:33,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:37:33,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:37:33,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:37:33,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:37:33,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:37:33,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:37:33,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:37:33,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:37:33,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:37:33,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:37:33,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:37:33,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:37:33,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:37:33,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:37:33,102 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:37:33,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:37:33,104 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:37:33,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:37:33,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:37:33,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:37:33,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:37:33,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:37:33,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:37:33,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:37:33,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:37:33,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:37:33,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:37:33,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:37:33,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:37:33,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:37:33,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:37:33,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:37:33,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:37:33,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:37:33,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:37:33,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:37:33,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:37:33,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:37:33,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:37:33,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:37:33,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:37:33,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:37:33,147 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:37:33,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:37:33,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:37:33,148 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:37:33,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:37:33,149 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:37:33,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:37:33,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:37:33,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:37:33,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:37:33,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:37:33,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:37:33,151 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:37:33,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:37:33,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:37:33,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:37:33,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:37:33,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:37:33,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:37:33,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:37:33,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:37:33,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:37:33,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:37:33,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:37:33,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:37:33,154 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:37:33,154 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:37:33,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:37:33,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5922a5be589e27d89439744489152c928c7510f0140c8b0fb4d1faadee969752 [2022-07-19 09:37:33,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:37:33,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:37:33,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:37:33,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:37:33,376 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:37:33,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr2.c [2022-07-19 09:37:33,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0e9cc4b/046b51d4528543d8bdf48a8e32a9bd17/FLAGef9aa37e7 [2022-07-19 09:37:33,784 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:37:33,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr2.c [2022-07-19 09:37:33,789 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0e9cc4b/046b51d4528543d8bdf48a8e32a9bd17/FLAGef9aa37e7 [2022-07-19 09:37:34,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0e9cc4b/046b51d4528543d8bdf48a8e32a9bd17 [2022-07-19 09:37:34,196 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:37:34,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:37:34,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:37:34,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:37:34,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:37:34,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5863f9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34, skipping insertion in model container [2022-07-19 09:37:34,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:37:34,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:37:34,359 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/array-tiling/pr2.c[394,407] [2022-07-19 09:37:34,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:37:34,395 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:37:34,408 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/array-tiling/pr2.c[394,407] [2022-07-19 09:37:34,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:37:34,424 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:37:34,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34 WrapperNode [2022-07-19 09:37:34,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:37:34,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:37:34,426 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:37:34,426 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:37:34,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,459 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-07-19 09:37:34,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:37:34,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:37:34,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:37:34,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:37:34,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:37:34,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:37:34,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:37:34,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:37:34,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (1/1) ... [2022-07-19 09:37:34,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:37:34,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:34,520 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) [2022-07-19 09:37:34,527 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 [2022-07-19 09:37:34,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:37:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:37:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:37:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:37:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:37:34,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:37:34,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:37:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:37:34,605 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:37:34,606 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:37:34,722 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:37:34,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:37:34,740 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 09:37:34,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:37:34 BoogieIcfgContainer [2022-07-19 09:37:34,741 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:37:34,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:37:34,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:37:34,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:37:34,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:37:34" (1/3) ... [2022-07-19 09:37:34,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3488f184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:37:34, skipping insertion in model container [2022-07-19 09:37:34,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:37:34" (2/3) ... [2022-07-19 09:37:34,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3488f184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:37:34, skipping insertion in model container [2022-07-19 09:37:34,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:37:34" (3/3) ... [2022-07-19 09:37:34,749 INFO L111 eAbstractionObserver]: Analyzing ICFG pr2.c [2022-07-19 09:37:34,783 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:37:34,784 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:37:34,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:37:34,828 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@68307d0f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@8b17256 [2022-07-19 09:37:34,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:37:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 09:37:34,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:34,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:34,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -583465863, now seen corresponding path program 1 times [2022-07-19 09:37:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:34,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810738142] [2022-07-19 09:37:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:34,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:34,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810738142] [2022-07-19 09:37:34,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810738142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:37:34,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:37:34,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 09:37:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151095289] [2022-07-19 09:37:34,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:37:34,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 09:37:34,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 09:37:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:37:35,008 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:35,025 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2022-07-19 09:37:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 09:37:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 09:37:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:35,034 INFO L225 Difference]: With dead ends: 43 [2022-07-19 09:37:35,034 INFO L226 Difference]: Without dead ends: 19 [2022-07-19 09:37:35,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 09:37:35,044 INFO L413 NwaCegarLoop]: 30 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, 30 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 [2022-07-19 09:37:35,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:37:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-19 09:37:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-19 09:37:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-19 09:37:35,065 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2022-07-19 09:37:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:35,065 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-19 09:37:35,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-19 09:37:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 09:37:35,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:35,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:35,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:37:35,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash 96592507, now seen corresponding path program 1 times [2022-07-19 09:37:35,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:35,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698332027] [2022-07-19 09:37:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:35,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698332027] [2022-07-19 09:37:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698332027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:37:35,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:37:35,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:37:35,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901252574] [2022-07-19 09:37:35,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:37:35,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:37:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:35,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:37:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:37:35,147 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:35,175 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-07-19 09:37:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:37:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 09:37:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:35,177 INFO L225 Difference]: With dead ends: 28 [2022-07-19 09:37:35,177 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 09:37:35,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:37:35,178 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:35,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:37:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 09:37:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-07-19 09:37:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-07-19 09:37:35,183 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2022-07-19 09:37:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:35,183 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-07-19 09:37:35,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-07-19 09:37:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 09:37:35,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:35,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:35,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 09:37:35,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash 96652089, now seen corresponding path program 1 times [2022-07-19 09:37:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262614495] [2022-07-19 09:37:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:35,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:35,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262614495] [2022-07-19 09:37:35,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262614495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:37:35,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:37:35,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 09:37:35,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306437671] [2022-07-19 09:37:35,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:37:35,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 09:37:35,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:35,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 09:37:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:37:35,365 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:35,419 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-07-19 09:37:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:37:35,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-19 09:37:35,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:35,420 INFO L225 Difference]: With dead ends: 36 [2022-07-19 09:37:35,420 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 09:37:35,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:37:35,422 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:35,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 21 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:37:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 09:37:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-07-19 09:37:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-07-19 09:37:35,427 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2022-07-19 09:37:35,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:35,427 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-07-19 09:37:35,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-07-19 09:37:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 09:37:35,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:35,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:35,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 09:37:35,432 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash 37256114, now seen corresponding path program 1 times [2022-07-19 09:37:35,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:35,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288536459] [2022-07-19 09:37:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:35,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:35,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:35,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288536459] [2022-07-19 09:37:35,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288536459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:35,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398212005] [2022-07-19 09:37:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:35,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:35,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:35,731 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) [2022-07-19 09:37:35,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:37:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 09:37:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:35,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:35,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:35,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:37:36,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:37:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:36,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:36,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-19 09:37:36,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:37:36,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:36,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398212005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:36,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:36,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2022-07-19 09:37:36,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331139266] [2022-07-19 09:37:36,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:36,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:37:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:37:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-19 09:37:36,189 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:36,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:36,680 INFO L93 Difference]: Finished difference Result 104 states and 123 transitions. [2022-07-19 09:37:36,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 09:37:36,681 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 09:37:36,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:36,683 INFO L225 Difference]: With dead ends: 104 [2022-07-19 09:37:36,683 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 09:37:36,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=850, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 09:37:36,685 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 255 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:36,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 130 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:37:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 09:37:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 29. [2022-07-19 09:37:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-07-19 09:37:36,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-07-19 09:37:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:36,693 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-07-19 09:37:36,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-07-19 09:37:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 09:37:36,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:36,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:36,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:36,919 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 [2022-07-19 09:37:36,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -355770896, now seen corresponding path program 1 times [2022-07-19 09:37:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038105832] [2022-07-19 09:37:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:36,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:36,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:36,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038105832] [2022-07-19 09:37:36,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038105832] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:37:36,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:37:36,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 09:37:36,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741329357] [2022-07-19 09:37:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:37:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 09:37:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 09:37:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 09:37:36,998 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:37,020 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-07-19 09:37:37,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 09:37:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 09:37:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:37,027 INFO L225 Difference]: With dead ends: 54 [2022-07-19 09:37:37,027 INFO L226 Difference]: Without dead ends: 39 [2022-07-19 09:37:37,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:37:37,030 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:37,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:37:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-19 09:37:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-07-19 09:37:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-19 09:37:37,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 17 [2022-07-19 09:37:37,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:37,038 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-19 09:37:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-19 09:37:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 09:37:37,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:37,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 09:37:37,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash 324287474, now seen corresponding path program 1 times [2022-07-19 09:37:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316407165] [2022-07-19 09:37:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:37,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:37,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316407165] [2022-07-19 09:37:37,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316407165] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:37,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893953376] [2022-07-19 09:37:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:37,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:37,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:37,204 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) [2022-07-19 09:37:37,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:37:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 09:37:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:37,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:37,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-07-19 09:37:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:37,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:37,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-19 09:37:37,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-19 09:37:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:37,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893953376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:37,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:37,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2022-07-19 09:37:37,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390438908] [2022-07-19 09:37:37,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:37,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:37:37,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:37,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:37:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:37:37,407 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:37,724 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2022-07-19 09:37:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:37:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 09:37:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:37,725 INFO L225 Difference]: With dead ends: 88 [2022-07-19 09:37:37,725 INFO L226 Difference]: Without dead ends: 86 [2022-07-19 09:37:37,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2022-07-19 09:37:37,726 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:37,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 146 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:37:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-19 09:37:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 37. [2022-07-19 09:37:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-19 09:37:37,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-07-19 09:37:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:37,732 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-19 09:37:37,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-19 09:37:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 09:37:37,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:37,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:37,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 09:37:37,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2078603285, now seen corresponding path program 1 times [2022-07-19 09:37:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002696552] [2022-07-19 09:37:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:38,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:38,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002696552] [2022-07-19 09:37:38,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002696552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:37:38,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:37:38,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:37:38,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19111265] [2022-07-19 09:37:38,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:37:38,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:37:38,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:38,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:37:38,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:37:38,013 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:38,023 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-19 09:37:38,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:37:38,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 09:37:38,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:38,027 INFO L225 Difference]: With dead ends: 57 [2022-07-19 09:37:38,027 INFO L226 Difference]: Without dead ends: 42 [2022-07-19 09:37:38,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:37:38,028 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:38,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:37:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-19 09:37:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-07-19 09:37:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:38,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-07-19 09:37:38,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 21 [2022-07-19 09:37:38,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:38,034 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-07-19 09:37:38,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:38,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-07-19 09:37:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 09:37:38,034 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:38,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:38,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 09:37:38,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2125491333, now seen corresponding path program 1 times [2022-07-19 09:37:38,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:38,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744255914] [2022-07-19 09:37:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744255914] [2022-07-19 09:37:38,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744255914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693961519] [2022-07-19 09:37:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:38,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:38,173 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) [2022-07-19 09:37:38,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:37:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:38,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 09:37:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:38,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:37:38,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:37:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:38,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:38,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:37:38,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:37:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:38,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693961519] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:38,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:38,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-07-19 09:37:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194199522] [2022-07-19 09:37:38,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:38,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:37:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:37:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-07-19 09:37:38,435 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:38,620 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2022-07-19 09:37:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 09:37:38,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 09:37:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:38,621 INFO L225 Difference]: With dead ends: 85 [2022-07-19 09:37:38,621 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 09:37:38,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:37:38,622 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 82 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:38,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 123 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:37:38,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 09:37:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 44. [2022-07-19 09:37:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-07-19 09:37:38,641 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 23 [2022-07-19 09:37:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:38,641 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-07-19 09:37:38,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:38,641 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-07-19 09:37:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 09:37:38,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:38,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:38,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:38,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:38,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:38,843 INFO L85 PathProgramCache]: Analyzing trace with hash 845627655, now seen corresponding path program 1 times [2022-07-19 09:37:38,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:38,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91302034] [2022-07-19 09:37:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:38,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:38,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:38,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91302034] [2022-07-19 09:37:38,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91302034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077710049] [2022-07-19 09:37:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:38,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:38,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:38,972 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) [2022-07-19 09:37:38,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:37:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 09:37:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:39,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-19 09:37:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:39,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:39,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:37:39,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:37:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:39,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077710049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:39,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:39,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-07-19 09:37:39,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254020068] [2022-07-19 09:37:39,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:39,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:37:39,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:39,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:37:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:37:39,173 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:39,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:39,490 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2022-07-19 09:37:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:37:39,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 09:37:39,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:39,491 INFO L225 Difference]: With dead ends: 102 [2022-07-19 09:37:39,491 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 09:37:39,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2022-07-19 09:37:39,492 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:39,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 143 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:37:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 09:37:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2022-07-19 09:37:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 56 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-07-19 09:37:39,499 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 23 [2022-07-19 09:37:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:39,499 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-07-19 09:37:39,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-07-19 09:37:39,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 09:37:39,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:39,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:39,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:39,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:39,701 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:39,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1664572736, now seen corresponding path program 1 times [2022-07-19 09:37:39,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:39,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870987380] [2022-07-19 09:37:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:39,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 09:37:39,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870987380] [2022-07-19 09:37:39,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870987380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:37:39,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:37:39,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 09:37:39,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889878160] [2022-07-19 09:37:39,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:37:39,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:37:39,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:39,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:37:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:37:39,736 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:39,749 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-19 09:37:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:37:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-19 09:37:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:39,750 INFO L225 Difference]: With dead ends: 80 [2022-07-19 09:37:39,750 INFO L226 Difference]: Without dead ends: 63 [2022-07-19 09:37:39,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 09:37:39,752 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:39,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:37:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-19 09:37:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2022-07-19 09:37:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-07-19 09:37:39,767 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 27 [2022-07-19 09:37:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:39,768 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-07-19 09:37:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-07-19 09:37:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:37:39,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:39,771 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:39,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 09:37:39,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash -147377384, now seen corresponding path program 2 times [2022-07-19 09:37:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:39,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110793097] [2022-07-19 09:37:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:39,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:39,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110793097] [2022-07-19 09:37:39,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110793097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012264816] [2022-07-19 09:37:39,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:37:39,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:39,990 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) [2022-07-19 09:37:40,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:37:40,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:37:40,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:40,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 09:37:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:40,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:40,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012264816] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:40,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:40,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-07-19 09:37:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676158271] [2022-07-19 09:37:40,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:40,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:37:40,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:37:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:37:40,422 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:40,608 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-07-19 09:37:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:37:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-19 09:37:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:40,609 INFO L225 Difference]: With dead ends: 108 [2022-07-19 09:37:40,609 INFO L226 Difference]: Without dead ends: 72 [2022-07-19 09:37:40,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2022-07-19 09:37:40,611 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 143 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:40,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 84 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:37:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-19 09:37:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2022-07-19 09:37:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-07-19 09:37:40,628 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 29 [2022-07-19 09:37:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:40,628 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-07-19 09:37:40,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-07-19 09:37:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 09:37:40,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:40,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:40,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:40,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 09:37:40,847 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:40,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1385615761, now seen corresponding path program 3 times [2022-07-19 09:37:40,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:40,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745085246] [2022-07-19 09:37:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:40,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745085246] [2022-07-19 09:37:40,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745085246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447938480] [2022-07-19 09:37:40,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:37:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:40,999 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) [2022-07-19 09:37:40,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:37:41,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:37:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:41,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:37:41,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:41,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:41,174 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:37:41,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:37:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:41,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:41,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-07-19 09:37:41,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 167 [2022-07-19 09:37:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:41,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447938480] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:41,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:41,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 32 [2022-07-19 09:37:41,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822717945] [2022-07-19 09:37:41,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:41,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 09:37:41,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 09:37:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-07-19 09:37:41,718 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:43,249 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2022-07-19 09:37:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 09:37:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 09:37:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:43,250 INFO L225 Difference]: With dead ends: 153 [2022-07-19 09:37:43,250 INFO L226 Difference]: Without dead ends: 143 [2022-07-19 09:37:43,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=752, Invalid=4360, Unknown=0, NotChecked=0, Total=5112 [2022-07-19 09:37:43,253 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 477 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:43,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 161 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 573 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-07-19 09:37:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-19 09:37:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 71. [2022-07-19 09:37:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2022-07-19 09:37:43,262 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 33 [2022-07-19 09:37:43,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:43,262 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2022-07-19 09:37:43,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2022-07-19 09:37:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:37:43,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:43,263 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:43,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:43,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:43,479 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:43,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:43,480 INFO L85 PathProgramCache]: Analyzing trace with hash 382246692, now seen corresponding path program 4 times [2022-07-19 09:37:43,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:43,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649229906] [2022-07-19 09:37:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:43,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:43,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649229906] [2022-07-19 09:37:43,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649229906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224104640] [2022-07-19 09:37:43,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:37:43,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:43,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:43,689 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) [2022-07-19 09:37:43,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:37:43,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:37:43,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:43,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:37:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:43,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:37:43,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:37:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:43,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:43,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:37:43,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-19 09:37:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:44,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224104640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:44,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:44,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-07-19 09:37:44,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507016062] [2022-07-19 09:37:44,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:44,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:37:44,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:37:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:37:44,049 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:44,554 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-07-19 09:37:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 09:37:44,555 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 09:37:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:44,556 INFO L225 Difference]: With dead ends: 129 [2022-07-19 09:37:44,556 INFO L226 Difference]: Without dead ends: 119 [2022-07-19 09:37:44,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:37:44,557 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:44,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 206 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:37:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-19 09:37:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2022-07-19 09:37:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.131578947368421) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-07-19 09:37:44,566 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 39 [2022-07-19 09:37:44,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:44,566 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-07-19 09:37:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-07-19 09:37:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:37:44,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:44,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:44,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:44,787 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1287892696, now seen corresponding path program 2 times [2022-07-19 09:37:44,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:44,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963867208] [2022-07-19 09:37:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:44,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:44,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963867208] [2022-07-19 09:37:44,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963867208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:44,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708096089] [2022-07-19 09:37:44,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:37:44,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:44,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:44,943 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) [2022-07-19 09:37:44,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:37:45,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:37:45,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 09:37:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:45,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:37:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:45,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:45,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:37:45,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:37:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:45,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708096089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:45,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:45,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-07-19 09:37:45,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657539175] [2022-07-19 09:37:45,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:45,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:37:45,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:45,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:37:45,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-07-19 09:37:45,268 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:46,046 INFO L93 Difference]: Finished difference Result 169 states and 190 transitions. [2022-07-19 09:37:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 09:37:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 09:37:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:46,048 INFO L225 Difference]: With dead ends: 169 [2022-07-19 09:37:46,048 INFO L226 Difference]: Without dead ends: 167 [2022-07-19 09:37:46,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=526, Invalid=2780, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 09:37:46,049 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 208 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:46,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 257 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 09:37:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-19 09:37:46,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 83. [2022-07-19 09:37:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2022-07-19 09:37:46,058 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 39 [2022-07-19 09:37:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:46,058 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2022-07-19 09:37:46,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2022-07-19 09:37:46,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 09:37:46,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:46,059 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:46,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:46,263 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,SelfDestructingSolverStorable13 [2022-07-19 09:37:46,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash -270486921, now seen corresponding path program 5 times [2022-07-19 09:37:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317907154] [2022-07-19 09:37:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:46,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:46,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:46,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317907154] [2022-07-19 09:37:46,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317907154] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:46,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65967638] [2022-07-19 09:37:46,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:37:46,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:46,494 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) [2022-07-19 09:37:46,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:37:46,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 09:37:46,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:46,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:37:46,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:46,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:47,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65967638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:47,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:47,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-07-19 09:37:47,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74835069] [2022-07-19 09:37:47,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:47,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 09:37:47,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 09:37:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 09:37:47,096 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:47,375 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2022-07-19 09:37:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 09:37:47,375 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-19 09:37:47,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:47,376 INFO L225 Difference]: With dead ends: 164 [2022-07-19 09:37:47,376 INFO L226 Difference]: Without dead ends: 104 [2022-07-19 09:37:47,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 09:37:47,377 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 228 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:47,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 170 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:37:47,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-19 09:37:47,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2022-07-19 09:37:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 94 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2022-07-19 09:37:47,387 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 45 [2022-07-19 09:37:47,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:47,388 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2022-07-19 09:37:47,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.696969696969697) internal successors, (122), 33 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2022-07-19 09:37:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 09:37:47,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:47,389 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:47,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:47,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 09:37:47,593 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:47,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1534181648, now seen corresponding path program 6 times [2022-07-19 09:37:47,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:47,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904474876] [2022-07-19 09:37:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:47,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:47,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:47,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904474876] [2022-07-19 09:37:47,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904474876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:47,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316324189] [2022-07-19 09:37:47,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:37:47,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:47,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:47,769 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) [2022-07-19 09:37:47,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:37:47,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 09:37:47,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 09:37:47,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:47,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:47,988 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:37:47,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:37:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:48,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:48,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-07-19 09:37:48,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 192 [2022-07-19 09:37:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:48,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316324189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:48,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:48,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-07-19 09:37:48,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600746358] [2022-07-19 09:37:48,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:48,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 09:37:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 09:37:48,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:37:48,594 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:50,502 INFO L93 Difference]: Finished difference Result 225 states and 249 transitions. [2022-07-19 09:37:50,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 09:37:50,502 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-19 09:37:50,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:50,503 INFO L225 Difference]: With dead ends: 225 [2022-07-19 09:37:50,503 INFO L226 Difference]: Without dead ends: 215 [2022-07-19 09:37:50,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=843, Invalid=5799, Unknown=0, NotChecked=0, Total=6642 [2022-07-19 09:37:50,505 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 379 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:50,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 564 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1264 Invalid, 0 Unknown, 67 Unchecked, 0.6s Time] [2022-07-19 09:37:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-19 09:37:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 125. [2022-07-19 09:37:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 124 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-07-19 09:37:50,516 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 49 [2022-07-19 09:37:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:50,516 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-07-19 09:37:50,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4871794871794872) internal successors, (136), 39 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-07-19 09:37:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 09:37:50,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:50,517 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:50,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:50,719 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,SelfDestructingSolverStorable15 [2022-07-19 09:37:50,719 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:50,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:50,720 INFO L85 PathProgramCache]: Analyzing trace with hash 746381232, now seen corresponding path program 1 times [2022-07-19 09:37:50,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:50,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788675385] [2022-07-19 09:37:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:50,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788675385] [2022-07-19 09:37:50,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788675385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:50,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844685759] [2022-07-19 09:37:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:50,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:50,845 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) [2022-07-19 09:37:50,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:37:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:50,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:37:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:50,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:50,952 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:37:50,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:37:51,089 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:37:51,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-19 09:37:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:51,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:51,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:37:51,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:37:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:51,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844685759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:51,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:51,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 19 [2022-07-19 09:37:51,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130495508] [2022-07-19 09:37:51,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:37:51,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:37:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:37:51,203 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:52,027 INFO L93 Difference]: Finished difference Result 247 states and 275 transitions. [2022-07-19 09:37:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 09:37:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-19 09:37:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:52,028 INFO L225 Difference]: With dead ends: 247 [2022-07-19 09:37:52,028 INFO L226 Difference]: Without dead ends: 245 [2022-07-19 09:37:52,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=427, Invalid=2995, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 09:37:52,030 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:52,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 294 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 09:37:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-19 09:37:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 131. [2022-07-19 09:37:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-07-19 09:37:52,044 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 49 [2022-07-19 09:37:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:52,044 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-07-19 09:37:52,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-07-19 09:37:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 09:37:52,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:52,045 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:52,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:52,245 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,SelfDestructingSolverStorable16 [2022-07-19 09:37:52,246 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1012702775, now seen corresponding path program 3 times [2022-07-19 09:37:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:52,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019893594] [2022-07-19 09:37:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:52,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:52,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:52,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019893594] [2022-07-19 09:37:52,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019893594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:52,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600980210] [2022-07-19 09:37:52,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:37:52,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:52,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:52,392 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) [2022-07-19 09:37:52,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:37:52,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 09:37:52,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:37:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:52,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:52,693 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:37:52,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-19 09:37:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:52,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:52,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:37:52,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:37:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:52,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600980210] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:52,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:52,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-07-19 09:37:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719855070] [2022-07-19 09:37:52,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:52,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:37:52,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:52,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:37:52,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-07-19 09:37:52,816 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:54,261 INFO L93 Difference]: Finished difference Result 348 states and 391 transitions. [2022-07-19 09:37:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-07-19 09:37:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-19 09:37:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:54,266 INFO L225 Difference]: With dead ends: 348 [2022-07-19 09:37:54,266 INFO L226 Difference]: Without dead ends: 346 [2022-07-19 09:37:54,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 97 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=915, Invalid=8397, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 09:37:54,269 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 249 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:54,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 453 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 09:37:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-07-19 09:37:54,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 143. [2022-07-19 09:37:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 142 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2022-07-19 09:37:54,283 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 55 [2022-07-19 09:37:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:54,283 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2022-07-19 09:37:54,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 21 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2022-07-19 09:37:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 09:37:54,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:54,284 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:54,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:54,487 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,SelfDestructingSolverStorable17 [2022-07-19 09:37:54,487 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1404832086, now seen corresponding path program 7 times [2022-07-19 09:37:54,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:54,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755638991] [2022-07-19 09:37:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:54,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:54,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:54,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755638991] [2022-07-19 09:37:54,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755638991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:54,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118349383] [2022-07-19 09:37:54,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:37:54,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:54,809 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) [2022-07-19 09:37:54,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:37:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:54,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 09:37:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:55,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:55,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118349383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:55,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:55,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2022-07-19 09:37:55,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047667374] [2022-07-19 09:37:55,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:55,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 09:37:55,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:55,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 09:37:55,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 09:37:55,518 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:55,807 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2022-07-19 09:37:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:37:55,807 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-19 09:37:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:55,808 INFO L225 Difference]: With dead ends: 272 [2022-07-19 09:37:55,808 INFO L226 Difference]: Without dead ends: 164 [2022-07-19 09:37:55,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 09:37:55,809 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 292 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:55,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 263 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:37:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-19 09:37:55,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-07-19 09:37:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.103896103896104) internal successors, (170), 154 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2022-07-19 09:37:55,828 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 61 [2022-07-19 09:37:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:55,828 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2022-07-19 09:37:55,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:37:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2022-07-19 09:37:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 09:37:55,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:55,829 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:55,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 09:37:56,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:56,029 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash 337347535, now seen corresponding path program 8 times [2022-07-19 09:37:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:56,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700596448] [2022-07-19 09:37:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700596448] [2022-07-19 09:37:56,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700596448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408935641] [2022-07-19 09:37:56,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:37:56,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:56,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:56,263 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) [2022-07-19 09:37:56,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 09:37:56,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:37:56,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:37:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:37:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:56,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:37:56,511 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:37:56,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:37:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 12 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:56,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:57,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-07-19 09:37:57,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-19 09:37:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:37:57,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408935641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:57,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:57,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 19] total 50 [2022-07-19 09:37:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069023983] [2022-07-19 09:37:57,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 09:37:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 09:37:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2254, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 09:37:57,477 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:02,067 INFO L93 Difference]: Finished difference Result 395 states and 438 transitions. [2022-07-19 09:38:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-19 09:38:02,067 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-19 09:38:02,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:02,068 INFO L225 Difference]: With dead ends: 395 [2022-07-19 09:38:02,068 INFO L226 Difference]: Without dead ends: 385 [2022-07-19 09:38:02,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7306 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2211, Invalid=21659, Unknown=0, NotChecked=0, Total=23870 [2022-07-19 09:38:02,074 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 476 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:02,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 522 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 09:38:02,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-07-19 09:38:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 161. [2022-07-19 09:38:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1) internal successors, (176), 160 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2022-07-19 09:38:02,096 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 65 [2022-07-19 09:38:02,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:02,096 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2022-07-19 09:38:02,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:02,097 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2022-07-19 09:38:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 09:38:02,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:02,097 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:02,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:02,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:02,303 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1382106319, now seen corresponding path program 2 times [2022-07-19 09:38:02,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:02,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229013081] [2022-07-19 09:38:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:02,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229013081] [2022-07-19 09:38:02,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229013081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195908938] [2022-07-19 09:38:02,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:38:02,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:02,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:02,469 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:02,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 09:38:02,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:38:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 09:38:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:02,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:38:02,576 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:38:02,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:38:02,784 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:38:02,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-19 09:38:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:02,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:02,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:38:02,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:38:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:02,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195908938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:02,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:02,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-07-19 09:38:02,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073196593] [2022-07-19 09:38:02,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:02,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:38:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:02,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:38:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-07-19 09:38:02,921 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:04,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:04,572 INFO L93 Difference]: Finished difference Result 411 states and 460 transitions. [2022-07-19 09:38:04,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-19 09:38:04,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-19 09:38:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:04,574 INFO L225 Difference]: With dead ends: 411 [2022-07-19 09:38:04,574 INFO L226 Difference]: Without dead ends: 409 [2022-07-19 09:38:04,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4410 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1090, Invalid=11342, Unknown=0, NotChecked=0, Total=12432 [2022-07-19 09:38:04,576 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 388 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:04,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 382 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 09:38:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-07-19 09:38:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 167. [2022-07-19 09:38:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1024096385542168) internal successors, (183), 166 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 183 transitions. [2022-07-19 09:38:04,601 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 183 transitions. Word has length 65 [2022-07-19 09:38:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:04,601 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 183 transitions. [2022-07-19 09:38:04,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.625) internal successors, (111), 24 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 183 transitions. [2022-07-19 09:38:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 09:38:04,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:04,602 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:04,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:04,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:04,807 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1975375134, now seen corresponding path program 9 times [2022-07-19 09:38:04,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:04,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743130350] [2022-07-19 09:38:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743130350] [2022-07-19 09:38:05,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743130350] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:05,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170756230] [2022-07-19 09:38:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:38:05,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:05,083 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:05,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 09:38:05,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 09:38:05,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 09:38:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:05,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:38:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:05,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:05,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:38:05,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-19 09:38:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:05,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170756230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:05,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:05,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 45 [2022-07-19 09:38:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880741276] [2022-07-19 09:38:05,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:05,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 09:38:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 09:38:05,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 09:38:05,933 INFO L87 Difference]: Start difference. First operand 167 states and 183 transitions. Second operand has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:08,897 INFO L93 Difference]: Finished difference Result 364 states and 393 transitions. [2022-07-19 09:38:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-19 09:38:08,899 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-19 09:38:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:08,900 INFO L225 Difference]: With dead ends: 364 [2022-07-19 09:38:08,900 INFO L226 Difference]: Without dead ends: 354 [2022-07-19 09:38:08,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3607 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1344, Invalid=12698, Unknown=0, NotChecked=0, Total=14042 [2022-07-19 09:38:08,902 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 443 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:08,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 607 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 09:38:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-19 09:38:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 173. [2022-07-19 09:38:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 172 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 189 transitions. [2022-07-19 09:38:08,926 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 189 transitions. Word has length 71 [2022-07-19 09:38:08,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:08,926 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 189 transitions. [2022-07-19 09:38:08,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.355555555555555) internal successors, (196), 45 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 189 transitions. [2022-07-19 09:38:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 09:38:08,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:08,928 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:08,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:09,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 09:38:09,142 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:09,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:09,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1821094634, now seen corresponding path program 4 times [2022-07-19 09:38:09,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:09,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517561926] [2022-07-19 09:38:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:09,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:09,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:09,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517561926] [2022-07-19 09:38:09,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517561926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:09,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639619809] [2022-07-19 09:38:09,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:38:09,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:09,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:09,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:09,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 09:38:09,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:38:09,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:09,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 09:38:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:09,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:38:09,731 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:38:09,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-19 09:38:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:09,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:09,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:38:09,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:38:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:09,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639619809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:09,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:09,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 26 [2022-07-19 09:38:09,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926510998] [2022-07-19 09:38:09,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:09,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:38:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:38:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:38:09,870 INFO L87 Difference]: Start difference. First operand 173 states and 189 transitions. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:12,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:12,991 INFO L93 Difference]: Finished difference Result 582 states and 654 transitions. [2022-07-19 09:38:12,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-07-19 09:38:12,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-19 09:38:12,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:12,994 INFO L225 Difference]: With dead ends: 582 [2022-07-19 09:38:12,994 INFO L226 Difference]: Without dead ends: 580 [2022-07-19 09:38:12,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 127 SyntacticMatches, 7 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13930 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2296, Invalid=32114, Unknown=0, NotChecked=0, Total=34410 [2022-07-19 09:38:12,997 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 558 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:12,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 657 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 09:38:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-07-19 09:38:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 179. [2022-07-19 09:38:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.101123595505618) internal successors, (196), 178 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 196 transitions. [2022-07-19 09:38:13,024 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 196 transitions. Word has length 71 [2022-07-19 09:38:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:13,024 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 196 transitions. [2022-07-19 09:38:13,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 196 transitions. [2022-07-19 09:38:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 09:38:13,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:13,025 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:13,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 09:38:13,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:13,235 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:13,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1772484533, now seen corresponding path program 10 times [2022-07-19 09:38:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:13,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246639392] [2022-07-19 09:38:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 157 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:13,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:13,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246639392] [2022-07-19 09:38:13,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246639392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:13,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506143781] [2022-07-19 09:38:13,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:38:13,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:13,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:13,604 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:13,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 09:38:13,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:38:13,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:13,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 09:38:13,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:14,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 200 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:14,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506143781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:14,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:14,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-07-19 09:38:14,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943077913] [2022-07-19 09:38:14,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:14,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 09:38:14,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 09:38:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 09:38:14,582 INFO L87 Difference]: Start difference. First operand 179 states and 196 transitions. Second operand has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:14,980 INFO L93 Difference]: Finished difference Result 332 states and 364 transitions. [2022-07-19 09:38:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 09:38:14,981 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-19 09:38:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:14,982 INFO L225 Difference]: With dead ends: 332 [2022-07-19 09:38:14,982 INFO L226 Difference]: Without dead ends: 200 [2022-07-19 09:38:14,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 09:38:14,988 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 447 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:14,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 302 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:38:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-19 09:38:15,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 191. [2022-07-19 09:38:15,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0947368421052632) internal successors, (208), 190 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 208 transitions. [2022-07-19 09:38:15,015 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 208 transitions. Word has length 77 [2022-07-19 09:38:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:15,015 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 208 transitions. [2022-07-19 09:38:15,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.211538461538462) internal successors, (219), 52 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 208 transitions. [2022-07-19 09:38:15,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 09:38:15,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:15,018 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:15,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:15,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:15,239 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1608818642, now seen corresponding path program 11 times [2022-07-19 09:38:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130842035] [2022-07-19 09:38:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:15,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:15,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:15,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130842035] [2022-07-19 09:38:15,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130842035] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:15,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458744972] [2022-07-19 09:38:15,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:38:15,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:15,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:15,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:15,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 09:38:15,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 09:38:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:15,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:38:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:15,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:38:15,907 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:38:15,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:38:16,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:38:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:16,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:16,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:38:16,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-19 09:38:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:16,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458744972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:16,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:16,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 56 [2022-07-19 09:38:16,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325553971] [2022-07-19 09:38:16,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:16,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-19 09:38:16,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:16,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-19 09:38:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2854, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 09:38:16,914 INFO L87 Difference]: Start difference. First operand 191 states and 208 transitions. Second operand has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:20,741 INFO L93 Difference]: Finished difference Result 398 states and 428 transitions. [2022-07-19 09:38:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-19 09:38:20,742 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-19 09:38:20,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:20,743 INFO L225 Difference]: With dead ends: 398 [2022-07-19 09:38:20,743 INFO L226 Difference]: Without dead ends: 388 [2022-07-19 09:38:20,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 131 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5476 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1823, Invalid=17359, Unknown=0, NotChecked=0, Total=19182 [2022-07-19 09:38:20,744 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 619 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:20,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 930 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 2074 Invalid, 0 Unknown, 561 Unchecked, 1.0s Time] [2022-07-19 09:38:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-19 09:38:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 197. [2022-07-19 09:38:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0918367346938775) internal successors, (214), 196 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 214 transitions. [2022-07-19 09:38:20,779 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 214 transitions. Word has length 81 [2022-07-19 09:38:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:20,780 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 214 transitions. [2022-07-19 09:38:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 4.125) internal successors, (231), 56 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:20,780 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 214 transitions. [2022-07-19 09:38:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 09:38:20,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:20,781 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:20,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:20,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:20,990 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1818791992, now seen corresponding path program 5 times [2022-07-19 09:38:20,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:20,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032487205] [2022-07-19 09:38:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:20,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 16 proven. 229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032487205] [2022-07-19 09:38:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032487205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766994668] [2022-07-19 09:38:21,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:38:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:21,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:21,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 09:38:21,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 09:38:21,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 09:38:21,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:21,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:38:21,688 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:38:21,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:38:21,701 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:38:21,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-19 09:38:22,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-19 09:38:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 58 proven. 185 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 09:38:22,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:24,471 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_320| Int)) (or (forall ((v_ArrVal_603 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_320|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_603) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_320|)))) is different from false [2022-07-19 09:38:24,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-07-19 09:38:24,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 192 [2022-07-19 09:38:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 58 proven. 181 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-07-19 09:38:24,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766994668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:24,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:24,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 54 [2022-07-19 09:38:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742753455] [2022-07-19 09:38:24,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:24,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 09:38:24,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 09:38:24,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2590, Unknown=1, NotChecked=102, Total=2862 [2022-07-19 09:38:24,854 INFO L87 Difference]: Start difference. First operand 197 states and 214 transitions. Second operand has 54 states, 54 states have (on average 4.166666666666667) internal successors, (225), 54 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:27,977 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8))) (forall ((|v_ULTIMATE.start_main_~i~0#1_320| Int)) (or (forall ((v_ArrVal_603 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_320|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_603) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_320|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= (select .cse0 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) 0) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= 3 (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-07-19 09:38:30,008 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (<= 1 |c_ULTIMATE.start_main_~CCCELVOL1~0#1|) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 8)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_320| Int)) (or (forall ((v_ArrVal_603 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_320|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_603) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 28)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_320|)))) (<= (select .cse0 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) 0) (< 1 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= 3 (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|)) (< (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2022-07-19 09:38:32,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:32,778 INFO L93 Difference]: Finished difference Result 335 states and 364 transitions. [2022-07-19 09:38:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-19 09:38:32,778 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.166666666666667) internal successors, (225), 54 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-19 09:38:32,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:32,779 INFO L225 Difference]: With dead ends: 335 [2022-07-19 09:38:32,779 INFO L226 Difference]: Without dead ends: 325 [2022-07-19 09:38:32,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4958 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1040, Invalid=17601, Unknown=3, NotChecked=816, Total=19460 [2022-07-19 09:38:32,781 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 834 mSDsluCounter, 1941 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 4631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:32,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 2007 Invalid, 4631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 3974 Invalid, 0 Unknown, 368 Unchecked, 1.7s Time] [2022-07-19 09:38:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-19 09:38:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 215. [2022-07-19 09:38:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.088785046728972) internal successors, (233), 214 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 233 transitions. [2022-07-19 09:38:32,808 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 233 transitions. Word has length 81 [2022-07-19 09:38:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:32,808 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 233 transitions. [2022-07-19 09:38:32,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.166666666666667) internal successors, (225), 54 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:38:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 233 transitions. [2022-07-19 09:38:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 09:38:32,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:32,810 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:32,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-19 09:38:33,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 09:38:33,015 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:33,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:33,015 INFO L85 PathProgramCache]: Analyzing trace with hash 307512236, now seen corresponding path program 3 times [2022-07-19 09:38:33,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:33,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332097419] [2022-07-19 09:38:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:38:33,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332097419] [2022-07-19 09:38:33,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332097419] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311673521] [2022-07-19 09:38:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:38:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:33,280 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:33,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 09:38:33,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 09:38:33,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:38:33,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:33,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:38:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:38:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:38:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:38:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:38:33,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:38:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:38:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:38:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,811 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:38:33,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-07-19 09:38:33,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,858 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:38:33,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-07-19 09:38:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:33,971 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 09:38:33,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-07-19 09:38:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-07-19 09:38:34,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:04,709 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_340| Int) (v_ArrVal_666 Int)) (or (<= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) 0) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_340|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 8)) v_ArrVal_666) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) |c_ULTIMATE.start_main_~CCCELVOL2~0#1|) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_340|)))) is different from false [2022-07-19 09:41:19,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-07-19 09:41:19,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5876 treesize of output 5868 [2022-07-19 09:41:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 25 proven. 26 refuted. 3 times theorem prover too weak. 187 trivial. 4 not checked. [2022-07-19 09:41:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311673521] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:23,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:23,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 15] total 44 [2022-07-19 09:41:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978786770] [2022-07-19 09:41:23,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 09:41:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 09:41:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1565, Unknown=63, NotChecked=82, Total=1892 [2022-07-19 09:41:23,836 INFO L87 Difference]: Start difference. First operand 215 states and 233 transitions. Second operand has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:29,331 INFO L93 Difference]: Finished difference Result 334 states and 363 transitions. [2022-07-19 09:41:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 09:41:29,332 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-19 09:41:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:29,332 INFO L225 Difference]: With dead ends: 334 [2022-07-19 09:41:29,333 INFO L226 Difference]: Without dead ends: 282 [2022-07-19 09:41:29,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 173.1s TimeCoverageRelationStatistics Valid=721, Invalid=5700, Unknown=63, NotChecked=158, Total=6642 [2022-07-19 09:41:29,334 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 152 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 591 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:29,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 300 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1521 Invalid, 0 Unknown, 591 Unchecked, 0.6s Time] [2022-07-19 09:41:29,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-19 09:41:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 215. [2022-07-19 09:41:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0841121495327102) internal successors, (232), 214 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 232 transitions. [2022-07-19 09:41:29,364 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 232 transitions. Word has length 81 [2022-07-19 09:41:29,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:29,364 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 232 transitions. [2022-07-19 09:41:29,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 232 transitions. [2022-07-19 09:41:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 09:41:29,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:29,366 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:29,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:29,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 09:41:29,576 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1845852266, now seen corresponding path program 4 times [2022-07-19 09:41:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:29,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211951554] [2022-07-19 09:41:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 92 proven. 51 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-19 09:41:29,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:29,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211951554] [2022-07-19 09:41:29,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211951554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:29,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079718827] [2022-07-19 09:41:29,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:41:29,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:29,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:29,910 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:29,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 09:41:30,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:41:30,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:30,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-19 09:41:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:30,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:41:30,086 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:41:30,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:41:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:30,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:30,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:41:30,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:41:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:30,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079718827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:30,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:30,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 41 [2022-07-19 09:41:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52609746] [2022-07-19 09:41:30,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:30,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 09:41:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:30,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 09:41:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 09:41:30,704 INFO L87 Difference]: Start difference. First operand 215 states and 232 transitions. Second operand has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:36,714 INFO L93 Difference]: Finished difference Result 592 states and 658 transitions. [2022-07-19 09:41:36,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-07-19 09:41:36,714 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-19 09:41:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:36,716 INFO L225 Difference]: With dead ends: 592 [2022-07-19 09:41:36,716 INFO L226 Difference]: Without dead ends: 552 [2022-07-19 09:41:36,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 131 SyntacticMatches, 11 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11529 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2712, Invalid=30230, Unknown=0, NotChecked=0, Total=32942 [2022-07-19 09:41:36,718 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1063 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 3115 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 3725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 3115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:36,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 603 Invalid, 3725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 3115 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 09:41:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-07-19 09:41:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 264. [2022-07-19 09:41:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0836501901140685) internal successors, (285), 263 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 285 transitions. [2022-07-19 09:41:36,756 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 285 transitions. Word has length 81 [2022-07-19 09:41:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:36,757 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 285 transitions. [2022-07-19 09:41:36,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.439024390243903) internal successors, (182), 41 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 285 transitions. [2022-07-19 09:41:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 09:41:36,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:36,758 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:36,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:36,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 09:41:36,972 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:36,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1465713665, now seen corresponding path program 12 times [2022-07-19 09:41:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:36,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13376052] [2022-07-19 09:41:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:36,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:37,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:37,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13376052] [2022-07-19 09:41:37,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13376052] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:37,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348786518] [2022-07-19 09:41:37,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:41:37,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:37,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:37,312 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:37,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 09:41:37,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-19 09:41:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:37,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-19 09:41:37,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:37,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:41:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:38,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:38,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:41:38,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:41:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 18 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:38,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348786518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:38,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:38,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 51 [2022-07-19 09:41:38,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486732621] [2022-07-19 09:41:38,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:38,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 09:41:38,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:38,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 09:41:38,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2371, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 09:41:38,640 INFO L87 Difference]: Start difference. First operand 264 states and 285 transitions. Second operand has 51 states, 51 states have (on average 4.647058823529412) internal successors, (237), 51 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:43,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:43,529 INFO L93 Difference]: Finished difference Result 560 states and 597 transitions. [2022-07-19 09:41:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-07-19 09:41:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.647058823529412) internal successors, (237), 51 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-19 09:41:43,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:43,531 INFO L225 Difference]: With dead ends: 560 [2022-07-19 09:41:43,531 INFO L226 Difference]: Without dead ends: 550 [2022-07-19 09:41:43,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7884 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2009, Invalid=23751, Unknown=0, NotChecked=0, Total=25760 [2022-07-19 09:41:43,533 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 823 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:43,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 866 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 09:41:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-19 09:41:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 270. [2022-07-19 09:41:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0817843866171004) internal successors, (291), 269 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 291 transitions. [2022-07-19 09:41:43,580 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 291 transitions. Word has length 87 [2022-07-19 09:41:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:43,580 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 291 transitions. [2022-07-19 09:41:43,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.647058823529412) internal successors, (237), 51 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 291 transitions. [2022-07-19 09:41:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 09:41:43,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:43,581 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 8, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:43,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:43,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:43,782 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash -181911479, now seen corresponding path program 6 times [2022-07-19 09:41:43,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:43,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167359902] [2022-07-19 09:41:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:43,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:44,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:44,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167359902] [2022-07-19 09:41:44,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167359902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:44,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409990669] [2022-07-19 09:41:44,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:41:44,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:44,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:44,056 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:44,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 09:41:44,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-19 09:41:44,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:44,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 09:41:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:44,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:41:44,847 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:41:44,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-19 09:41:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:44,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:44,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:41:44,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-19 09:41:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:45,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409990669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:45,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:45,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 31 [2022-07-19 09:41:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602423998] [2022-07-19 09:41:45,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:45,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 09:41:45,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:45,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 09:41:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-07-19 09:41:45,018 INFO L87 Difference]: Start difference. First operand 270 states and 291 transitions. Second operand has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:50,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:50,597 INFO L93 Difference]: Finished difference Result 787 states and 861 transitions. [2022-07-19 09:41:50,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2022-07-19 09:41:50,597 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-19 09:41:50,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:50,599 INFO L225 Difference]: With dead ends: 787 [2022-07-19 09:41:50,599 INFO L226 Difference]: Without dead ends: 785 [2022-07-19 09:41:50,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 157 SyntacticMatches, 7 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27359 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3481, Invalid=61799, Unknown=0, NotChecked=0, Total=65280 [2022-07-19 09:41:50,603 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 784 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 3967 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 4415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 3967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:50,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 958 Invalid, 4415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 3967 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 09:41:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-19 09:41:50,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 282. [2022-07-19 09:41:50,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.0818505338078293) internal successors, (304), 281 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 304 transitions. [2022-07-19 09:41:50,660 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 304 transitions. Word has length 87 [2022-07-19 09:41:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:50,661 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 304 transitions. [2022-07-19 09:41:50,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.806451612903226) internal successors, (149), 31 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 304 transitions. [2022-07-19 09:41:50,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 09:41:50,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:50,661 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:50,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:50,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:50,862 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash 190528916, now seen corresponding path program 13 times [2022-07-19 09:41:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483442088] [2022-07-19 09:41:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 255 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:51,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483442088] [2022-07-19 09:41:51,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483442088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576888634] [2022-07-19 09:41:51,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:41:51,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:51,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:51,369 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:51,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 09:41:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:51,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:41:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 310 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:52,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 310 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576888634] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:52,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:52,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 61 [2022-07-19 09:41:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578685083] [2022-07-19 09:41:52,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:52,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-19 09:41:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:52,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-19 09:41:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=2826, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 09:41:52,683 INFO L87 Difference]: Start difference. First operand 282 states and 304 transitions. Second operand has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:41:53,196 INFO L93 Difference]: Finished difference Result 440 states and 471 transitions. [2022-07-19 09:41:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 09:41:53,196 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-19 09:41:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:41:53,197 INFO L225 Difference]: With dead ends: 440 [2022-07-19 09:41:53,197 INFO L226 Difference]: Without dead ends: 260 [2022-07-19 09:41:53,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1173, Invalid=3797, Unknown=0, NotChecked=0, Total=4970 [2022-07-19 09:41:53,198 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 427 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:41:53,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 390 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:41:53,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-19 09:41:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 251. [2022-07-19 09:41:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.072) internal successors, (268), 250 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 268 transitions. [2022-07-19 09:41:53,235 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 268 transitions. Word has length 93 [2022-07-19 09:41:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:41:53,235 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 268 transitions. [2022-07-19 09:41:53,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.377049180327869) internal successors, (267), 61 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 09:41:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 268 transitions. [2022-07-19 09:41:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 09:41:53,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:41:53,237 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:41:53,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 09:41:53,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-19 09:41:53,450 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:41:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:41:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash -632646643, now seen corresponding path program 14 times [2022-07-19 09:41:53,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:41:53,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226412652] [2022-07-19 09:41:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:41:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:41:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:41:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:53,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:41:53,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226412652] [2022-07-19 09:41:53,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226412652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:41:53,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850727421] [2022-07-19 09:41:53,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:41:53,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:41:53,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:41:53,872 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:41:53,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 09:41:53,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:41:53,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:41:53,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 09:41:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:41:54,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:41:54,255 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:41:54,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:41:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 20 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:54,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:41:55,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-07-19 09:41:55,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-07-19 09:41:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:41:56,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850727421] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:41:56,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:41:56,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 25] total 68 [2022-07-19 09:41:56,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862974660] [2022-07-19 09:41:56,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:41:56,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-19 09:41:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:41:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-19 09:41:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=4288, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 09:41:56,008 INFO L87 Difference]: Start difference. First operand 251 states and 268 transitions. Second operand has 68 states, 68 states have (on average 4.161764705882353) internal successors, (283), 68 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)