./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum_const2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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-crafted/zero_sum_const2.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 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:40:31,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:40:31,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:40:31,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:40:31,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:40:31,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:40:31,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:40:31,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:40:31,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:40:31,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:40:31,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:40:31,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:40:31,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:40:31,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:40:31,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:40:31,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:40:31,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:40:31,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:40:31,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:40:31,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:40:31,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:40:31,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:40:31,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:40:31,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:40:31,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:40:31,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:40:31,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:40:31,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:40:31,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:40:31,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:40:31,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:40:31,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:40:31,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:40:31,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:40:31,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:40:31,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:40:31,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:40:31,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:40:31,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:40:31,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:40:31,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:40:31,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:40:31,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:40:31,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:40:31,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:40:31,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:40:31,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:40:31,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:40:31,368 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:40:31,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:40:31,369 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:40:31,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:40:31,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:40:31,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:40:31,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:40:31,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:40:31,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:40:31,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:40:31,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:40:31,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:40:31,371 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:40:31,371 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:40:31,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:40:31,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:40:31,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:40:31,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:40:31,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:40:31,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:40:31,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:40:31,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:40:31,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:40:31,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:40:31,373 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:40:31,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:40:31,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:40:31,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:40:31,374 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1be1405ed24182ea691f06aafa4c0ada74bba78ab2a6f90fefc65156bb70df6c [2021-12-15 21:40:31,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:40:31,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:40:31,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:40:31,609 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:40:31,611 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:40:31,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum_const2.c [2021-12-15 21:40:31,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0958f0015/269da422520a4c9fa8a68b4c95d879a1/FLAGfef60d5b9 [2021-12-15 21:40:32,040 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:40:32,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum_const2.c [2021-12-15 21:40:32,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0958f0015/269da422520a4c9fa8a68b4c95d879a1/FLAGfef60d5b9 [2021-12-15 21:40:32,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0958f0015/269da422520a4c9fa8a68b4c95d879a1 [2021-12-15 21:40:32,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:40:32,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:40:32,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:40:32,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:40:32,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:40:32,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2167f3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32, skipping insertion in model container [2021-12-15 21:40:32,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:40:32,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:40:32,215 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-crafted/zero_sum_const2.c[406,419] [2021-12-15 21:40:32,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:40:32,242 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:40:32,254 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-crafted/zero_sum_const2.c[406,419] [2021-12-15 21:40:32,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:40:32,285 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:40:32,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32 WrapperNode [2021-12-15 21:40:32,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:40:32,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:40:32,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:40:32,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:40:32,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,296 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,308 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2021-12-15 21:40:32,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:40:32,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:40:32,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:40:32,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:40:32,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:40:32,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:40:32,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:40:32,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:40:32,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (1/1) ... [2021-12-15 21:40:32,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:40:32,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:32,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:40:32,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:40:32,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:40:32,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:40:32,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:40:32,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:40:32,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:40:32,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:40:32,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:40:32,450 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:40:32,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:40:32,601 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:40:32,605 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:40:32,605 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-15 21:40:32,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:32 BoogieIcfgContainer [2021-12-15 21:40:32,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:40:32,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:40:32,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:40:32,614 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:40:32,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:40:32" (1/3) ... [2021-12-15 21:40:32,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3c344d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:32, skipping insertion in model container [2021-12-15 21:40:32,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:40:32" (2/3) ... [2021-12-15 21:40:32,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3c344d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:40:32, skipping insertion in model container [2021-12-15 21:40:32,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:40:32" (3/3) ... [2021-12-15 21:40:32,617 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2021-12-15 21:40:32,621 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:40:32,621 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:40:32,687 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:40:32,693 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:40:32,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:40:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:32,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 21:40:32,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:32,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:32,724 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:32,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2021-12-15 21:40:32,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:32,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603982737] [2021-12-15 21:40:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:32,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:32,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603982737] [2021-12-15 21:40:32,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603982737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:32,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:32,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:40:32,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748856554] [2021-12-15 21:40:32,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:32,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:40:32,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:40:32,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:40:32,909 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 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 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:32,923 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-12-15 21:40:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:40:32,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 21:40:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:32,931 INFO L225 Difference]: With dead ends: 47 [2021-12-15 21:40:32,931 INFO L226 Difference]: Without dead ends: 21 [2021-12-15 21:40:32,933 INFO L932 BasicCegarLoop]: 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 [2021-12-15 21:40:32,936 INFO L933 BasicCegarLoop]: 31 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, 31 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 [2021-12-15 21:40:32,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-12-15 21:40:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-12-15 21:40:32,962 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) [2021-12-15 21:40:32,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-15 21:40:32,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2021-12-15 21:40:32,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:32,965 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-15 21:40:32,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:32,965 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-15 21:40:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 21:40:32,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:32,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:32,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:40:32,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:32,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2021-12-15 21:40:32,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:32,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748224626] [2021-12-15 21:40:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:32,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:33,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:33,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748224626] [2021-12-15 21:40:33,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748224626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:33,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:33,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:40:33,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976358106] [2021-12-15 21:40:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:33,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:40:33,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:40:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:40:33,060 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:33,098 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-12-15 21:40:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:40:33,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 21:40:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:33,099 INFO L225 Difference]: With dead ends: 39 [2021-12-15 21:40:33,100 INFO L226 Difference]: Without dead ends: 23 [2021-12-15 21:40:33,103 INFO L932 BasicCegarLoop]: 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 [2021-12-15 21:40:33,104 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:33,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-15 21:40:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-12-15 21:40:33,110 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) [2021-12-15 21:40:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-15 21:40:33,110 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2021-12-15 21:40:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:33,111 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-15 21:40:33,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-15 21:40:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 21:40:33,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:33,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:33,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:40:33,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash -66597874, now seen corresponding path program 1 times [2021-12-15 21:40:33,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:33,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785354859] [2021-12-15 21:40:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:40:33,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:33,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785354859] [2021-12-15 21:40:33,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785354859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:40:33,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:40:33,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:40:33,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515785306] [2021-12-15 21:40:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:40:33,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:40:33,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:40:33,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:40:33,161 INFO L87 Difference]: Start difference. First operand 22 states and 26 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) [2021-12-15 21:40:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:33,221 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-12-15 21:40:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:40:33,221 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 [2021-12-15 21:40:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:33,222 INFO L225 Difference]: With dead ends: 44 [2021-12-15 21:40:33,222 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 21:40:33,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:40:33,225 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:33,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 21:40:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-15 21:40:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-15 21:40:33,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-15 21:40:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:33,234 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-15 21:40:33,234 INFO L471 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) [2021-12-15 21:40:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-15 21:40:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 21:40:33,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:33,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:33,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:40:33,236 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:33,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2021-12-15 21:40:33,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:33,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640108701] [2021-12-15 21:40:33,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:33,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:40:33,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:33,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640108701] [2021-12-15 21:40:33,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640108701] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:33,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136312302] [2021-12-15 21:40:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:33,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:33,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:33,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:33,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:40:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:33,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:40:33,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:40:33,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:40:33,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136312302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:33,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:33,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 21:40:33,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23895833] [2021-12-15 21:40:33,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:33,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 21:40:33,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 21:40:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:40:33,504 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:33,544 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-15 21:40:33,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 21:40:33,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 21:40:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:33,545 INFO L225 Difference]: With dead ends: 49 [2021-12-15 21:40:33,545 INFO L226 Difference]: Without dead ends: 29 [2021-12-15 21:40:33,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-12-15 21:40:33,546 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:33,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-15 21:40:33,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-15 21:40:33,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-15 21:40:33,550 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-12-15 21:40:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:33,550 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-15 21:40:33,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-15 21:40:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 21:40:33,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:33,551 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:33,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:33,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:33,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2021-12-15 21:40:33,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:33,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482753924] [2021-12-15 21:40:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:33,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:40:33,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482753924] [2021-12-15 21:40:33,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482753924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:33,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023285509] [2021-12-15 21:40:33,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:40:33,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:33,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:33,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:33,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:40:33,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:40:33,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 21:40:33,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:40:34,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 21:40:34,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023285509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:34,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:34,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-15 21:40:34,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750930293] [2021-12-15 21:40:34,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:34,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 21:40:34,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:34,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 21:40:34,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 21:40:34,064 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:34,124 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-12-15 21:40:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 21:40:34,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 21:40:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:34,125 INFO L225 Difference]: With dead ends: 57 [2021-12-15 21:40:34,125 INFO L226 Difference]: Without dead ends: 41 [2021-12-15 21:40:34,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-12-15 21:40:34,126 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:34,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:40:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-15 21:40:34,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-12-15 21:40:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-15 21:40:34,130 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2021-12-15 21:40:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:34,130 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-15 21:40:34,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-15 21:40:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-15 21:40:34,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:34,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:34,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:34,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:34,343 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2021-12-15 21:40:34,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:34,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813935286] [2021-12-15 21:40:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:34,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:34,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813935286] [2021-12-15 21:40:34,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813935286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:34,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157261705] [2021-12-15 21:40:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:40:34,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:34,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:34,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:40:35,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:40:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-15 21:40:35,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:36,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:40:36,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:40:36,033 INFO L388 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 15 treesize of output 9 [2021-12-15 21:40:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:36,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:39,456 INFO L354 Elim1Store]: treesize reduction 58, result has 72.5 percent of original size [2021-12-15 21:40:39,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 175 [2021-12-15 21:40:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:50,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157261705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:50,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:50,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 29] total 63 [2021-12-15 21:40:50,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575586053] [2021-12-15 21:40:50,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:50,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-15 21:40:50,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:50,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-15 21:40:50,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=3546, Unknown=0, NotChecked=0, Total=3906 [2021-12-15 21:40:50,805 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 63 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 63 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) [2021-12-15 21:40:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:53,445 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2021-12-15 21:40:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-15 21:40:53,445 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 63 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 35 [2021-12-15 21:40:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:53,447 INFO L225 Difference]: With dead ends: 100 [2021-12-15 21:40:53,447 INFO L226 Difference]: Without dead ends: 96 [2021-12-15 21:40:53,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 11 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=931, Invalid=9169, Unknown=0, NotChecked=0, Total=10100 [2021-12-15 21:40:53,450 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 626 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:53,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 106 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 378 Invalid, 0 Unknown, 626 Unchecked, 0.2s Time] [2021-12-15 21:40:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-15 21:40:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 53. [2021-12-15 21:40:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-12-15 21:40:53,456 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2021-12-15 21:40:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:53,456 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-12-15 21:40:53,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 63 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) [2021-12-15 21:40:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-12-15 21:40:53,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 21:40:53,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:53,457 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:53,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 21:40:53,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:53,689 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:53,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:53,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2021-12-15 21:40:53,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:53,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111778878] [2021-12-15 21:40:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:53,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:40:53,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:53,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111778878] [2021-12-15 21:40:53,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111778878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:53,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271249858] [2021-12-15 21:40:53,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:40:53,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:53,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:53,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:53,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:40:53,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:40:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:40:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:40:53,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 21:40:53,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271249858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:53,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:53,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 21:40:53,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809794471] [2021-12-15 21:40:53,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:53,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:40:53,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:53,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:40:53,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:40:53,948 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:54,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:54,073 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-12-15 21:40:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 21:40:54,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 21:40:54,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:54,074 INFO L225 Difference]: With dead ends: 121 [2021-12-15 21:40:54,074 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 21:40:54,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:40:54,074 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:54,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 31 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:54,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 21:40:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-12-15 21:40:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-12-15 21:40:54,079 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2021-12-15 21:40:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:54,079 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-12-15 21:40:54,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-12-15 21:40:54,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-15 21:40:54,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:54,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:54,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 21:40:54,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:54,291 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2021-12-15 21:40:54,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:54,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164299889] [2021-12-15 21:40:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:54,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 21:40:54,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:54,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164299889] [2021-12-15 21:40:54,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164299889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731214898] [2021-12-15 21:40:54,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:40:54,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:54,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:54,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:54,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 21:40:54,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 21:40:54,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 21:40:54,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 21:40:54,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 21:40:54,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731214898] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:54,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:54,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 21:40:54,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893592431] [2021-12-15 21:40:54,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:54,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 21:40:54,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 21:40:54,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 21:40:54,574 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:40:54,712 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-12-15 21:40:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 21:40:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-15 21:40:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:40:54,717 INFO L225 Difference]: With dead ends: 66 [2021-12-15 21:40:54,718 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 21:40:54,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-15 21:40:54,718 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:40:54,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:40:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 21:40:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-12-15 21:40:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-15 21:40:54,732 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2021-12-15 21:40:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:40:54,732 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-15 21:40:54,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:40:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-15 21:40:54,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-15 21:40:54,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:40:54,733 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:40:54,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 21:40:54,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:54,948 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:40:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:40:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2021-12-15 21:40:54,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:40:54,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613363716] [2021-12-15 21:40:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:40:54,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:40:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:40:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:40:56,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:40:56,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613363716] [2021-12-15 21:40:56,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613363716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:40:56,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400444352] [2021-12-15 21:40:56,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:40:56,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:40:56,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:40:56,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:40:56,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 21:40:56,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 21:40:56,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:40:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-15 21:40:56,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:40:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 21:40:57,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:40:58,094 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-12-15 21:40:58,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2021-12-15 21:40:58,256 INFO L354 Elim1Store]: treesize reduction 198, result has 6.2 percent of original size [2021-12-15 21:40:58,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2021-12-15 21:40:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:40:58,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400444352] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:40:58,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:40:58,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 17, 16] total 62 [2021-12-15 21:40:58,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668029170] [2021-12-15 21:40:58,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:40:58,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-15 21:40:58,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:40:58,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-15 21:40:58,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3554, Unknown=0, NotChecked=0, Total=3782 [2021-12-15 21:40:58,324 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:01,457 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-15 21:41:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-15 21:41:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-15 21:41:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:01,458 INFO L225 Difference]: With dead ends: 80 [2021-12-15 21:41:01,458 INFO L226 Difference]: Without dead ends: 76 [2021-12-15 21:41:01,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=677, Invalid=9025, Unknown=0, NotChecked=0, Total=9702 [2021-12-15 21:41:01,460 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:01,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 95 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 21:41:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-15 21:41:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-12-15 21:41:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-15 21:41:01,465 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2021-12-15 21:41:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:01,465 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-15 21:41:01,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.8709677419354838) internal successors, (116), 62 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-15 21:41:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 21:41:01,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:01,465 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:41:01,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-15 21:41:01,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:01,683 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2021-12-15 21:41:01,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790290432] [2021-12-15 21:41:01,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:01,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 21:41:01,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:01,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790290432] [2021-12-15 21:41:01,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790290432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166998604] [2021-12-15 21:41:01,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 21:41:01,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:01,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:01,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:01,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 21:41:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 21:41:01,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 21:41:01,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 21:41:02,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166998604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:02,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:02,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 21:41:02,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497313607] [2021-12-15 21:41:02,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:02,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:41:02,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:41:02,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:41:02,058 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:02,221 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-12-15 21:41:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:41:02,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 21:41:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:02,222 INFO L225 Difference]: With dead ends: 149 [2021-12-15 21:41:02,222 INFO L226 Difference]: Without dead ends: 86 [2021-12-15 21:41:02,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-15 21:41:02,223 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:02,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 37 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:41:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-15 21:41:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2021-12-15 21:41:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-12-15 21:41:02,228 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2021-12-15 21:41:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:02,228 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-12-15 21:41:02,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-12-15 21:41:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 21:41:02,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:02,229 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:41:02,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 21:41:02,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:02,440 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2021-12-15 21:41:02,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:02,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648300475] [2021-12-15 21:41:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:02,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 21:41:02,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648300475] [2021-12-15 21:41:02,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648300475] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442589647] [2021-12-15 21:41:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:41:02,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:02,504 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:02,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 21:41:02,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:41:02,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:02,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 21:41:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 21:41:02,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 21:41:02,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442589647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:02,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:02,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 21:41:02,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576553223] [2021-12-15 21:41:02,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 21:41:02,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 21:41:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 21:41:02,770 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:02,958 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-12-15 21:41:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 21:41:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-15 21:41:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:02,959 INFO L225 Difference]: With dead ends: 80 [2021-12-15 21:41:02,959 INFO L226 Difference]: Without dead ends: 60 [2021-12-15 21:41:02,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:41:02,959 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:02,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 23 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:41:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-15 21:41:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-12-15 21:41:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-12-15 21:41:02,963 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2021-12-15 21:41:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:02,963 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-12-15 21:41:02,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-12-15 21:41:02,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 21:41:02,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:02,963 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:41:02,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-15 21:41:03,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 21:41:03,167 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:03,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:03,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2021-12-15 21:41:03,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:03,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349354160] [2021-12-15 21:41:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:03,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:41:05,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:05,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349354160] [2021-12-15 21:41:05,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349354160] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:05,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523077570] [2021-12-15 21:41:05,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:41:05,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:05,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:05,530 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:05,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 21:41:05,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 21:41:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:05,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-15 21:41:05,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:05,695 INFO L388 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 15 treesize of output 11 [2021-12-15 21:41:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:41:11,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:41:11,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:41:11,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 21:41:11,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2021-12-15 21:41:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 5 proven. 71 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 21:41:11,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 21:41:16,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523077570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:16,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:16,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 26, 21] total 86 [2021-12-15 21:41:16,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479417487] [2021-12-15 21:41:16,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:16,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-15 21:41:16,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-15 21:41:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=6763, Unknown=1, NotChecked=0, Total=7310 [2021-12-15 21:41:16,030 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 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) [2021-12-15 21:41:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:19,850 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-12-15 21:41:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-15 21:41:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 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 55 [2021-12-15 21:41:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:19,851 INFO L225 Difference]: With dead ends: 94 [2021-12-15 21:41:19,851 INFO L226 Difference]: Without dead ends: 90 [2021-12-15 21:41:19,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 58 SyntacticMatches, 14 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1290, Invalid=16799, Unknown=1, NotChecked=0, Total=18090 [2021-12-15 21:41:19,854 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:19,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 125 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 790 Invalid, 0 Unknown, 571 Unchecked, 0.4s Time] [2021-12-15 21:41:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-15 21:41:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 81. [2021-12-15 21:41:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2021-12-15 21:41:19,867 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2021-12-15 21:41:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:19,867 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2021-12-15 21:41:19,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.7325581395348837) internal successors, (149), 86 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) [2021-12-15 21:41:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2021-12-15 21:41:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-15 21:41:19,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:19,871 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:41:19,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 21:41:20,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:20,087 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2021-12-15 21:41:20,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:20,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899091669] [2021-12-15 21:41:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:20,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 21:41:20,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:20,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899091669] [2021-12-15 21:41:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899091669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:20,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861301358] [2021-12-15 21:41:20,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:41:20,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:20,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:20,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 21:41:20,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:41:20,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:20,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 21:41:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 21:41:20,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 21:41:20,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861301358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:20,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:20,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-15 21:41:20,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688705830] [2021-12-15 21:41:20,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:20,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 21:41:20,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:20,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 21:41:20,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-15 21:41:20,490 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:20,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:20,710 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2021-12-15 21:41:20,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 21:41:20,711 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-15 21:41:20,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:20,711 INFO L225 Difference]: With dead ends: 177 [2021-12-15 21:41:20,711 INFO L226 Difference]: Without dead ends: 100 [2021-12-15 21:41:20,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-15 21:41:20,712 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 137 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:20,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 34 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:41:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-15 21:41:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-12-15 21:41:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-12-15 21:41:20,716 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2021-12-15 21:41:20,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:20,716 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-12-15 21:41:20,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-12-15 21:41:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-15 21:41:20,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:20,718 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:41:20,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 21:41:20,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 21:41:20,919 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:20,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2021-12-15 21:41:20,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:20,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136608634] [2021-12-15 21:41:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:20,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-15 21:41:21,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136608634] [2021-12-15 21:41:21,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136608634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81807655] [2021-12-15 21:41:21,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 21:41:21,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:21,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:21,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:21,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 21:41:21,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-15 21:41:21,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 21:41:21,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-15 21:41:21,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:41:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-15 21:41:21,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81807655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:41:21,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:41:21,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-15 21:41:21,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206712262] [2021-12-15 21:41:21,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:41:21,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-15 21:41:21,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:41:21,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-15 21:41:21,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-15 21:41:21,270 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:41:21,553 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-12-15 21:41:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 21:41:21,554 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-15 21:41:21,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:41:21,554 INFO L225 Difference]: With dead ends: 94 [2021-12-15 21:41:21,554 INFO L226 Difference]: Without dead ends: 70 [2021-12-15 21:41:21,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-12-15 21:41:21,555 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 121 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:41:21,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 25 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 21:41:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-15 21:41:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-15 21:41:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-15 21:41:21,559 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2021-12-15 21:41:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:41:21,559 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-15 21:41:21,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:41:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-15 21:41:21,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 21:41:21,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:41:21,559 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:41:21,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-15 21:41:21,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 21:41:21,771 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:41:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:41:21,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2021-12-15 21:41:21,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:41:21,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673309454] [2021-12-15 21:41:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:41:21,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:41:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:41:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:41:24,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:41:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673309454] [2021-12-15 21:41:24,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673309454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:41:24,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368413255] [2021-12-15 21:41:24,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 21:41:24,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:41:24,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:41:24,855 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 21:41:24,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 21:41:24,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-15 21:41:24,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:41:24,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-15 21:41:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:41:25,066 INFO L388 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 15 treesize of output 11 [2021-12-15 21:41:34,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:41:34,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:41:34,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:41:34,284 INFO L354 Elim1Store]: treesize reduction 45, result has 32.8 percent of original size [2021-12-15 21:41:34,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 42 treesize of output 33 [2021-12-15 21:41:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:41:34,596 INFO L328 TraceCheckSpWp]: Computing backward predicates...