/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:15:03,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:15:03,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:15:03,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:15:03,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:15:03,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:15:03,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:15:03,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:15:03,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:15:03,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:15:03,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:15:03,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:15:03,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:15:03,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:15:03,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:15:03,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:15:03,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:15:03,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:15:03,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:15:03,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:15:03,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:15:03,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:15:03,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:15:03,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:15:03,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:15:03,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:15:03,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:15:03,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:15:03,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:15:03,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:15:03,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:15:03,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:15:03,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:15:03,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:15:03,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:15:03,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:15:03,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:15:03,555 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:15:03,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:15:03,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:15:03,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:15:03,561 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:15:03,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:15:03,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:15:03,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:15:03,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:15:03,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:15:03,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:15:03,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:15:03,564 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:15:03,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:15:03,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:15:03,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:15:03,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:15:03,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:15:03,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:15:03,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:15:03,566 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:15:03,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:15:03,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:15:03,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:15:03,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:15:03,567 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:15:03,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:15:04,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:15:04,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:15:04,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:15:04,012 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:15:04,013 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2020-12-21 22:15:04,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20e688f0/9770ff2b994b4f4aaf569c898c764d54/FLAGf4fde7d06 [2020-12-21 22:15:04,842 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:15:04,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2020-12-21 22:15:04,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20e688f0/9770ff2b994b4f4aaf569c898c764d54/FLAGf4fde7d06 [2020-12-21 22:15:05,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a20e688f0/9770ff2b994b4f4aaf569c898c764d54 [2020-12-21 22:15:05,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:15:05,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:15:05,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:15:05,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:15:05,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:15:05,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4465857a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05, skipping insertion in model container [2020-12-21 22:15:05,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:15:05,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:15:05,414 WARN L226 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-programs/partial_mod_count_limited_gen.c[333,346] [2020-12-21 22:15:05,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:15:05,469 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:15:05,490 WARN L226 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-programs/partial_mod_count_limited_gen.c[333,346] [2020-12-21 22:15:05,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:15:05,542 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:15:05,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05 WrapperNode [2020-12-21 22:15:05,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:15:05,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:15:05,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:15:05,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:15:05,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:15:05,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:15:05,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:15:05,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:15:05,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... [2020-12-21 22:15:05,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:15:05,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:15:05,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:15:05,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:15:05,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:15:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:15:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:15:05,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:15:05,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:15:05,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:15:05,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:15:05,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:15:06,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:15:06,342 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 22:15:06,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:15:06 BoogieIcfgContainer [2020-12-21 22:15:06,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:15:06,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:15:06,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:15:06,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:15:06,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:15:05" (1/3) ... [2020-12-21 22:15:06,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1053294b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:15:06, skipping insertion in model container [2020-12-21 22:15:06,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:15:05" (2/3) ... [2020-12-21 22:15:06,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1053294b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:15:06, skipping insertion in model container [2020-12-21 22:15:06,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:15:06" (3/3) ... [2020-12-21 22:15:06,357 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_gen.c [2020-12-21 22:15:06,365 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:15:06,370 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:15:06,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:15:06,424 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:15:06,424 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:15:06,424 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:15:06,424 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:15:06,425 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:15:06,425 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:15:06,425 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:15:06,425 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:15:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-21 22:15:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:15:06,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:06,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:06,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:06,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1209811911, now seen corresponding path program 1 times [2020-12-21 22:15:06,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:06,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529817775] [2020-12-21 22:15:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:15:06,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529817775] [2020-12-21 22:15:06,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:06,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:15:06,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545748813] [2020-12-21 22:15:06,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:15:06,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:06,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:15:06,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:15:06,682 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-21 22:15:06,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:06,701 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-12-21 22:15:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:15:06,703 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-21 22:15:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:06,713 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:15:06,713 INFO L226 Difference]: Without dead ends: 19 [2020-12-21 22:15:06,716 INFO L677 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 [2020-12-21 22:15:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-21 22:15:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-21 22:15:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:15:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 22:15:06,759 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2020-12-21 22:15:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:06,760 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 22:15:06,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:15:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 22:15:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:15:06,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:06,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:06,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 22:15:06,762 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash 171311037, now seen corresponding path program 1 times [2020-12-21 22:15:06,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:06,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123176065] [2020-12-21 22:15:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:06,787 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:06,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691072886] [2020-12-21 22:15:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:06,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:15:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:15:07,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123176065] [2020-12-21 22:15:07,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:07,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691072886] [2020-12-21 22:15:07,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:07,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:15:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74190267] [2020-12-21 22:15:07,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:15:07,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:15:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:15:07,017 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-12-21 22:15:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:09,120 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-12-21 22:15:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:15:09,121 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-21 22:15:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:09,122 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:15:09,122 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:15:09,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:15:09,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:15:09,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-12-21 22:15:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:15:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-21 22:15:09,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2020-12-21 22:15:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:09,130 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-21 22:15:09,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:15:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-21 22:15:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:15:09,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:09,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:09,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 22:15:09,333 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash -109052629, now seen corresponding path program 1 times [2020-12-21 22:15:09,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:09,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163435845] [2020-12-21 22:15:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:09,376 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:09,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638872912] [2020-12-21 22:15:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:15:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:15:09,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163435845] [2020-12-21 22:15:09,548 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:09,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638872912] [2020-12-21 22:15:09,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:09,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:15:09,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372353175] [2020-12-21 22:15:09,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:15:09,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:15:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:15:09,560 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-12-21 22:15:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:11,736 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-12-21 22:15:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:15:11,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-21 22:15:11,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:11,738 INFO L225 Difference]: With dead ends: 40 [2020-12-21 22:15:11,738 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 22:15:11,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:15:11,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 22:15:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-12-21 22:15:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-21 22:15:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-12-21 22:15:11,746 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2020-12-21 22:15:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:11,746 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-12-21 22:15:11,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:15:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-12-21 22:15:11,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:15:11,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:11,748 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:11,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:11,963 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:11,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1516161923, now seen corresponding path program 2 times [2020-12-21 22:15:11,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:11,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158149335] [2020-12-21 22:15:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:11,983 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:11,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977671872] [2020-12-21 22:15:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true