/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-examples/standard_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:28:57,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:28:57,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:28:57,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:28:57,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:28:57,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:28:57,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:28:57,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:28:57,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:28:57,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:28:57,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:28:57,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:28:57,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:28:57,473 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:28:57,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:28:57,477 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:28:57,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:28:57,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:28:57,506 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:28:57,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:28:57,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:28:57,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:28:57,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:28:57,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:28:57,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:28:57,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:28:57,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:28:57,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:28:57,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:28:57,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:28:57,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:28:57,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:28:57,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:28:57,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:28:57,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:28:57,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:28:57,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:28:57,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:28:57,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:28:57,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:28:57,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:28:57,609 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:28:57,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:28:57,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:28:57,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:28:57,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:28:57,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:28:57,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:28:57,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:28:57,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:28:57,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:28:57,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:28:57,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:28:57,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:28:57,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:28:57,614 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:28:57,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:28:57,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:28:57,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:28:57,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:28:57,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:28:57,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:28:57,615 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:28:58,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:28:58,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:28:58,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:28:58,118 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:28:58,123 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:28:58,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2020-12-21 21:28:58,224 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8f4b63d/6b34e7e5bf64484f8b8268fc17f4f6a9/FLAG23a597b66 [2020-12-21 21:28:58,919 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:28:58,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy9_ground-1.i [2020-12-21 21:28:58,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8f4b63d/6b34e7e5bf64484f8b8268fc17f4f6a9/FLAG23a597b66 [2020-12-21 21:28:59,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8f4b63d/6b34e7e5bf64484f8b8268fc17f4f6a9 [2020-12-21 21:28:59,230 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:28:59,232 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:28:59,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:28:59,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:28:59,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:28:59,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3b75ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59, skipping insertion in model container [2020-12-21 21:28:59,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:28:59,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:28:59,474 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-examples/standard_copy9_ground-1.i[816,829] [2020-12-21 21:28:59,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:28:59,517 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:28:59,533 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-examples/standard_copy9_ground-1.i[816,829] [2020-12-21 21:28:59,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:28:59,571 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:28:59,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59 WrapperNode [2020-12-21 21:28:59,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:28:59,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:28:59,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:28:59,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:28:59,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:28:59,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:28:59,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:28:59,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:28:59,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (1/1) ... [2020-12-21 21:28:59,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:28:59,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:28:59,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:28:59,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:28:59,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (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 21:28:59,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:28:59,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:28:59,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:28:59,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:28:59,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:28:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:28:59,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:29:00,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:29:00,419 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-21 21:29:00,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:00 BoogieIcfgContainer [2020-12-21 21:29:00,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:29:00,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:29:00,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:29:00,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:29:00,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:28:59" (1/3) ... [2020-12-21 21:29:00,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6addd1d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:00, skipping insertion in model container [2020-12-21 21:29:00,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:59" (2/3) ... [2020-12-21 21:29:00,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6addd1d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:29:00, skipping insertion in model container [2020-12-21 21:29:00,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:29:00" (3/3) ... [2020-12-21 21:29:00,440 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2020-12-21 21:29:00,448 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:29:00,453 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:29:00,475 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:29:00,526 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:29:00,526 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:29:00,527 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:29:00,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:29:00,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:29:00,527 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:29:00,527 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:29:00,528 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:29:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-21 21:29:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:29:00,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:00,567 INFO L422 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] [2020-12-21 21:29:00,567 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:00,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1887916137, now seen corresponding path program 1 times [2020-12-21 21:29:00,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:00,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053727449] [2020-12-21 21:29:00,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:00,936 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 21:29:00,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053727449] [2020-12-21 21:29:00,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:29:00,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:29:00,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387905477] [2020-12-21 21:29:00,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:29:00,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:29:00,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:29:00,971 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-12-21 21:29:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:01,039 INFO L93 Difference]: Finished difference Result 82 states and 126 transitions. [2020-12-21 21:29:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:29:01,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 21:29:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:01,058 INFO L225 Difference]: With dead ends: 82 [2020-12-21 21:29:01,058 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 21:29:01,062 INFO L677 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 [2020-12-21 21:29:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 21:29:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-21 21:29:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:29:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2020-12-21 21:29:01,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 25 [2020-12-21 21:29:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:01,114 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2020-12-21 21:29:01,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:29:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2020-12-21 21:29:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:29:01,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,118 INFO L422 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, 1, 1] [2020-12-21 21:29:01,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:29:01,120 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash -166940861, now seen corresponding path program 1 times [2020-12-21 21:29:01,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:01,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448659253] [2020-12-21 21:29:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,244 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 21:29:01,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448659253] [2020-12-21 21:29:01,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421362839] [2020-12-21 21:29:01,245 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 21:29:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:29:01,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:29:01,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:29:01,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:29:01,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073305552] [2020-12-21 21:29:01,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:29:01,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:29:01,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:01,452 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2020-12-21 21:29:01,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:01,632 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2020-12-21 21:29:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:29:01,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-21 21:29:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:01,635 INFO L225 Difference]: With dead ends: 88 [2020-12-21 21:29:01,635 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:29:01,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:01,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:29:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-12-21 21:29:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 21:29:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-21 21:29:01,646 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 27 [2020-12-21 21:29:01,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:01,646 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-21 21:29:01,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:29:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-21 21:29:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:29:01,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:01,648 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:01,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:29:01,864 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:01,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:01,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1109508687, now seen corresponding path program 1 times [2020-12-21 21:29:01,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:01,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631749745] [2020-12-21 21:29:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:29:01,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631749745] [2020-12-21 21:29:01,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017673183] [2020-12-21 21:29:01,948 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 21:29:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:29:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 21:29:02,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:02,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:29:02,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897816664] [2020-12-21 21:29:02,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:29:02,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:02,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:29:02,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:02,232 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 5 states. [2020-12-21 21:29:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:02,268 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-12-21 21:29:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:29:02,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-12-21 21:29:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:02,271 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:29:02,271 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 21:29:02,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 21:29:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 21:29:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-21 21:29:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:29:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-21 21:29:02,279 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 45 [2020-12-21 21:29:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:02,280 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-21 21:29:02,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:29:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-21 21:29:02,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:29:02,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:02,282 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:02,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:02,496 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1487152111, now seen corresponding path program 2 times [2020-12-21 21:29:02,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:02,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105341004] [2020-12-21 21:29:02,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:29:02,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105341004] [2020-12-21 21:29:02,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165870892] [2020-12-21 21:29:02,616 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 [2020-12-21 21:29:02,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:29:02,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:29:02,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:29:02,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:02,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:29:02,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253029046] [2020-12-21 21:29:02,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:29:02,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:02,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:29:02,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:29:02,883 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-12-21 21:29:03,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:03,130 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2020-12-21 21:29:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:29:03,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-12-21 21:29:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:03,132 INFO L225 Difference]: With dead ends: 116 [2020-12-21 21:29:03,132 INFO L226 Difference]: Without dead ends: 77 [2020-12-21 21:29:03,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 21:29:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-21 21:29:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-12-21 21:29:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:29:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-12-21 21:29:03,143 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2020-12-21 21:29:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:03,143 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-12-21 21:29:03,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:29:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-12-21 21:29:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:29:03,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:03,146 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:03,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,359 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1870323549, now seen corresponding path program 3 times [2020-12-21 21:29:03,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:03,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941612571] [2020-12-21 21:29:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:29:03,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941612571] [2020-12-21 21:29:03,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57893661] [2020-12-21 21:29:03,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:03,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:29:03,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:29:03,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-21 21:29:03,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:03,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 21:29:03,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724924486] [2020-12-21 21:29:03,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:29:03,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:03,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:29:03,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:03,956 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 8 states. [2020-12-21 21:29:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:04,226 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2020-12-21 21:29:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:29:04,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-12-21 21:29:04,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:04,232 INFO L225 Difference]: With dead ends: 159 [2020-12-21 21:29:04,232 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 21:29:04,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:29:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 21:29:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-12-21 21:29:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 21:29:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-12-21 21:29:04,264 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 65 [2020-12-21 21:29:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:04,268 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-12-21 21:29:04,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:29:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-12-21 21:29:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:29:04,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:04,272 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:04,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:04,488 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1430561545, now seen corresponding path program 4 times [2020-12-21 21:29:04,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:04,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603293139] [2020-12-21 21:29:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:29:04,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603293139] [2020-12-21 21:29:04,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081476066] [2020-12-21 21:29:04,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:29:04,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:29:04,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:29:04,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:29:04,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:29:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:29:04,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:29:04,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:29:04,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54538994] [2020-12-21 21:29:04,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:29:04,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:29:04,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:29:04,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:04,842 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 7 states. [2020-12-21 21:29:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:29:04,875 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2020-12-21 21:29:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:29:04,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-12-21 21:29:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:29:04,876 INFO L225 Difference]: With dead ends: 170 [2020-12-21 21:29:04,876 INFO L226 Difference]: Without dead ends: 91 [2020-12-21 21:29:04,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:29:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-21 21:29:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-12-21 21:29:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-21 21:29:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2020-12-21 21:29:04,886 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 85 [2020-12-21 21:29:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:29:04,886 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2020-12-21 21:29:04,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:29:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2020-12-21 21:29:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 21:29:04,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:29:04,888 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:29:05,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:29:05,103 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:29:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:29:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash -59313337, now seen corresponding path program 5 times [2020-12-21 21:29:05,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:29:05,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523921543] [2020-12-21 21:29:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:29:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:29:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-12-21 21:29:05,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523921543] [2020-12-21 21:29:05,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200307384] [2020-12-21 21:29:05,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true