/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/bitvector/byte_add-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:11:02,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:11:02,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:11:02,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 23:11:02,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 23:11:02,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 23:11:02,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 23:11:02,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 23:11:02,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 23:11:02,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 23:11:02,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 23:11:02,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 23:11:02,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 23:11:02,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 23:11:02,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 23:11:02,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 23:11:02,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 23:11:02,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 23:11:02,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 23:11:02,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 23:11:02,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 23:11:02,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 23:11:02,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 23:11:02,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 23:11:02,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 23:11:02,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 23:11:02,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 23:11:02,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 23:11:02,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 23:11:02,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 23:11:02,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 23:11:02,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 23:11:02,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 23:11:02,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:11:02,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:11:02,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:11:02,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:11:02,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:11:02,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:11:02,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:11:02,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:11:02,253 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:11:02,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:11:02,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:11:02,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:11:02,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:11:02,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:11:02,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:11:02,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:11:02,258 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:11:02,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:11:02,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:11:02,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:11:02,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:11:02,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:11:02,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:11:02,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:11:02,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:11:02,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:11:02,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:11:02,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:11:02,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:11:02,262 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:11:02,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:11:02,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:11:02,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:11:02,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:11:02,750 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:11:02,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/byte_add-1.i [2020-12-21 23:11:02,837 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d25dc41b6/ff2ca016e4784962bca283702bc0b7bf/FLAG8db242dc2 [2020-12-21 23:11:03,551 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:11:03,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/byte_add-1.i [2020-12-21 23:11:03,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d25dc41b6/ff2ca016e4784962bca283702bc0b7bf/FLAG8db242dc2 [2020-12-21 23:11:03,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d25dc41b6/ff2ca016e4784962bca283702bc0b7bf [2020-12-21 23:11:03,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:11:03,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:11:03,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:11:03,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:11:03,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:11:03,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:11:03" (1/1) ... [2020-12-21 23:11:03,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@edf1efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:03, skipping insertion in model container [2020-12-21 23:11:03,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:11:03" (1/1) ... [2020-12-21 23:11:03,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:11:03,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:11:04,199 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/bitvector/byte_add-1.i[861,874] [2020-12-21 23:11:04,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:11:04,334 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:11:04,357 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/bitvector/byte_add-1.i[861,874] [2020-12-21 23:11:04,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:11:04,433 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:11:04,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04 WrapperNode [2020-12-21 23:11:04,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:11:04,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:11:04,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:11:04,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:11:04,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,476 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,518 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:11:04,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:11:04,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:11:04,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:11:04,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (1/1) ... [2020-12-21 23:11:04,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:11:04,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:11:04,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:11:04,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:11:04,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (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 23:11:04,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:11:04,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:11:04,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:11:04,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:11:05,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:11:05,265 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 23:11:05,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:11:05 BoogieIcfgContainer [2020-12-21 23:11:05,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:11:05,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:11:05,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:11:05,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:11:05,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:11:03" (1/3) ... [2020-12-21 23:11:05,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78855d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:11:05, skipping insertion in model container [2020-12-21 23:11:05,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:11:04" (2/3) ... [2020-12-21 23:11:05,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78855d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:11:05, skipping insertion in model container [2020-12-21 23:11:05,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:11:05" (3/3) ... [2020-12-21 23:11:05,277 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add-1.i [2020-12-21 23:11:05,284 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:11:05,288 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:11:05,316 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:11:05,362 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:11:05,362 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:11:05,362 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:11:05,362 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:11:05,362 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:11:05,363 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:11:05,363 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:11:05,363 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:11:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-21 23:11:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 23:11:05,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:05,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:05,388 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:05,395 INFO L82 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2020-12-21 23:11:05,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:05,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131447349] [2020-12-21 23:11:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:05,662 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 23:11:05,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131447349] [2020-12-21 23:11:05,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:05,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:11:05,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60525238] [2020-12-21 23:11:05,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 23:11:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:05,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 23:11:05,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 23:11:05,702 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2020-12-21 23:11:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:05,733 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2020-12-21 23:11:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 23:11:05,736 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-21 23:11:05,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:05,760 INFO L225 Difference]: With dead ends: 57 [2020-12-21 23:11:05,761 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 23:11:05,764 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 23:11:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 23:11:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 23:11:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 23:11:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2020-12-21 23:11:05,816 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2020-12-21 23:11:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:05,817 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2020-12-21 23:11:05,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 23:11:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2020-12-21 23:11:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 23:11:05,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:05,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:05,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:11:05,822 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2020-12-21 23:11:05,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:05,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708535024] [2020-12-21 23:11:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:06,055 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 23:11:06,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708535024] [2020-12-21 23:11:06,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:06,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:11:06,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158522636] [2020-12-21 23:11:06,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:11:06,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:11:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:11:06,064 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand 3 states. [2020-12-21 23:11:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:06,376 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2020-12-21 23:11:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:11:06,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 23:11:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:06,384 INFO L225 Difference]: With dead ends: 89 [2020-12-21 23:11:06,384 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 23:11:06,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 23:11:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 23:11:06,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-12-21 23:11:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 23:11:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2020-12-21 23:11:06,408 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2020-12-21 23:11:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:06,409 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2020-12-21 23:11:06,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:11:06,409 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2020-12-21 23:11:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 23:11:06,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:06,412 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 23:11:06,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 23:11:06,413 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:06,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:06,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2020-12-21 23:11:06,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:06,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925552853] [2020-12-21 23:11:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:06,579 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 23:11:06,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925552853] [2020-12-21 23:11:06,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:06,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 23:11:06,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337939224] [2020-12-21 23:11:06,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:11:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:06,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:11:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:11:06,583 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand 4 states. [2020-12-21 23:11:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:06,849 INFO L93 Difference]: Finished difference Result 152 states and 231 transitions. [2020-12-21 23:11:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:11:06,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-21 23:11:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:06,855 INFO L225 Difference]: With dead ends: 152 [2020-12-21 23:11:06,856 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 23:11:06,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:11:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 23:11:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2020-12-21 23:11:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 23:11:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 99 transitions. [2020-12-21 23:11:06,875 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 99 transitions. Word has length 18 [2020-12-21 23:11:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:06,896 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 99 transitions. [2020-12-21 23:11:06,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:11:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 99 transitions. [2020-12-21 23:11:06,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 23:11:06,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:06,898 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:06,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 23:11:06,898 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:06,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:06,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1598588856, now seen corresponding path program 1 times [2020-12-21 23:11:06,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:06,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747073159] [2020-12-21 23:11:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:06,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:07,050 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 23:11:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747073159] [2020-12-21 23:11:07,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:07,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 23:11:07,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862452245] [2020-12-21 23:11:07,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:11:07,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:11:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:11:07,053 INFO L87 Difference]: Start difference. First operand 66 states and 99 transitions. Second operand 4 states. [2020-12-21 23:11:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:07,298 INFO L93 Difference]: Finished difference Result 153 states and 231 transitions. [2020-12-21 23:11:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:11:07,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 23:11:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:07,299 INFO L225 Difference]: With dead ends: 153 [2020-12-21 23:11:07,300 INFO L226 Difference]: Without dead ends: 115 [2020-12-21 23:11:07,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:11:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-21 23:11:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-12-21 23:11:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 23:11:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 111 transitions. [2020-12-21 23:11:07,309 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 111 transitions. Word has length 19 [2020-12-21 23:11:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:07,309 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 111 transitions. [2020-12-21 23:11:07,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:11:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 111 transitions. [2020-12-21 23:11:07,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 23:11:07,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:07,311 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] [2020-12-21 23:11:07,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 23:11:07,311 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:07,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash -170409323, now seen corresponding path program 1 times [2020-12-21 23:11:07,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:07,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488429411] [2020-12-21 23:11:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:07,410 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 23:11:07,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488429411] [2020-12-21 23:11:07,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656185189] [2020-12-21 23:11:07,411 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 23:11:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:07,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 23:11:07,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:11:07,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:07,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-21 23:11:07,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498041919] [2020-12-21 23:11:07,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:11:07,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:07,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:11:07,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:11:07,670 INFO L87 Difference]: Start difference. First operand 77 states and 111 transitions. Second operand 4 states. [2020-12-21 23:11:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:07,920 INFO L93 Difference]: Finished difference Result 146 states and 237 transitions. [2020-12-21 23:11:07,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:11:07,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-21 23:11:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:07,921 INFO L225 Difference]: With dead ends: 146 [2020-12-21 23:11:07,922 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 23:11:07,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:11:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 23:11:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2020-12-21 23:11:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-21 23:11:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 138 transitions. [2020-12-21 23:11:07,933 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 138 transitions. Word has length 20 [2020-12-21 23:11:07,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:07,933 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 138 transitions. [2020-12-21 23:11:07,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:11:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 138 transitions. [2020-12-21 23:11:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 23:11:07,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:07,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:08,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:11:08,152 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:08,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:08,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1606169286, now seen corresponding path program 1 times [2020-12-21 23:11:08,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:08,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500663456] [2020-12-21 23:11:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:11:08,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500663456] [2020-12-21 23:11:08,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656061488] [2020-12-21 23:11:08,252 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 23:11:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:08,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:11:08,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 23:11:08,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:08,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2020-12-21 23:11:08,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596808521] [2020-12-21 23:11:08,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:11:08,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:08,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:11:08,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:11:08,465 INFO L87 Difference]: Start difference. First operand 100 states and 138 transitions. Second operand 4 states. [2020-12-21 23:11:08,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:08,833 INFO L93 Difference]: Finished difference Result 212 states and 313 transitions. [2020-12-21 23:11:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:11:08,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-12-21 23:11:08,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:08,835 INFO L225 Difference]: With dead ends: 212 [2020-12-21 23:11:08,836 INFO L226 Difference]: Without dead ends: 145 [2020-12-21 23:11:08,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:11:08,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-21 23:11:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2020-12-21 23:11:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-21 23:11:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 165 transitions. [2020-12-21 23:11:08,861 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 165 transitions. Word has length 26 [2020-12-21 23:11:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:08,862 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 165 transitions. [2020-12-21 23:11:08,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:11:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 165 transitions. [2020-12-21 23:11:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 23:11:08,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:08,867 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:09,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:11:09,069 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:09,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:09,070 INFO L82 PathProgramCache]: Analyzing trace with hash 23363195, now seen corresponding path program 1 times [2020-12-21 23:11:09,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:09,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181404679] [2020-12-21 23:11:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:11:09,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181404679] [2020-12-21 23:11:09,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796297982] [2020-12-21 23:11:09,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:11:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:09,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:11:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 23:11:09,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:09,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2020-12-21 23:11:09,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531044569] [2020-12-21 23:11:09,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:11:09,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:11:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:09,528 INFO L87 Difference]: Start difference. First operand 123 states and 165 transitions. Second operand 4 states. [2020-12-21 23:11:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:09,824 INFO L93 Difference]: Finished difference Result 258 states and 365 transitions. [2020-12-21 23:11:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:11:09,824 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-12-21 23:11:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:09,826 INFO L225 Difference]: With dead ends: 258 [2020-12-21 23:11:09,826 INFO L226 Difference]: Without dead ends: 168 [2020-12-21 23:11:09,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-21 23:11:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2020-12-21 23:11:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 23:11:09,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2020-12-21 23:11:09,836 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 32 [2020-12-21 23:11:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:09,836 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2020-12-21 23:11:09,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:11:09,836 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2020-12-21 23:11:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 23:11:09,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:09,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:10,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:11:10,053 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:10,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:10,054 INFO L82 PathProgramCache]: Analyzing trace with hash 86397356, now seen corresponding path program 1 times [2020-12-21 23:11:10,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:10,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425162557] [2020-12-21 23:11:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 23:11:10,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425162557] [2020-12-21 23:11:10,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:10,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 23:11:10,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898851001] [2020-12-21 23:11:10,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:11:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:11:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:11:10,193 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand 5 states. [2020-12-21 23:11:10,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:10,666 INFO L93 Difference]: Finished difference Result 538 states and 696 transitions. [2020-12-21 23:11:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:11:10,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-21 23:11:10,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:10,670 INFO L225 Difference]: With dead ends: 538 [2020-12-21 23:11:10,670 INFO L226 Difference]: Without dead ends: 422 [2020-12-21 23:11:10,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-12-21 23:11:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 146. [2020-12-21 23:11:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 23:11:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2020-12-21 23:11:10,681 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 38 [2020-12-21 23:11:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:10,681 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2020-12-21 23:11:10,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:11:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2020-12-21 23:11:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 23:11:10,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:10,684 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:10,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-21 23:11:10,684 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash -345904797, now seen corresponding path program 1 times [2020-12-21 23:11:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:10,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72348290] [2020-12-21 23:11:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 23:11:10,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72348290] [2020-12-21 23:11:10,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:10,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 23:11:10,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713750348] [2020-12-21 23:11:10,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:11:10,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:10,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:11:10,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:11:10,811 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand 5 states. [2020-12-21 23:11:11,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:11,310 INFO L93 Difference]: Finished difference Result 518 states and 671 transitions. [2020-12-21 23:11:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:11:11,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-21 23:11:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:11,317 INFO L225 Difference]: With dead ends: 518 [2020-12-21 23:11:11,317 INFO L226 Difference]: Without dead ends: 403 [2020-12-21 23:11:11,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:11,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-12-21 23:11:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 146. [2020-12-21 23:11:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 23:11:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2020-12-21 23:11:11,336 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 39 [2020-12-21 23:11:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:11,336 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2020-12-21 23:11:11,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:11:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2020-12-21 23:11:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 23:11:11,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:11,339 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:11,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-21 23:11:11,339 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:11,340 INFO L82 PathProgramCache]: Analyzing trace with hash 190859729, now seen corresponding path program 1 times [2020-12-21 23:11:11,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:11,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165604607] [2020-12-21 23:11:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 23:11:11,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165604607] [2020-12-21 23:11:11,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:11,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 23:11:11,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463732016] [2020-12-21 23:11:11,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:11:11,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:11,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:11:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:11:11,464 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand 6 states. [2020-12-21 23:11:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:12,125 INFO L93 Difference]: Finished difference Result 652 states and 841 transitions. [2020-12-21 23:11:12,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:11:12,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-12-21 23:11:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:12,128 INFO L225 Difference]: With dead ends: 652 [2020-12-21 23:11:12,129 INFO L226 Difference]: Without dead ends: 537 [2020-12-21 23:11:12,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:11:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2020-12-21 23:11:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 146. [2020-12-21 23:11:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 23:11:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2020-12-21 23:11:12,143 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 40 [2020-12-21 23:11:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:12,144 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2020-12-21 23:11:12,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:11:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2020-12-21 23:11:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-21 23:11:12,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:12,149 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:12,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 23:11:12,149 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash -83899885, now seen corresponding path program 1 times [2020-12-21 23:11:12,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:12,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901043454] [2020-12-21 23:11:12,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-21 23:11:12,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901043454] [2020-12-21 23:11:12,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:12,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-21 23:11:12,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397070866] [2020-12-21 23:11:12,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:11:12,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:11:12,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:12,327 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand 7 states. [2020-12-21 23:11:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:13,183 INFO L93 Difference]: Finished difference Result 693 states and 892 transitions. [2020-12-21 23:11:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 23:11:13,184 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-12-21 23:11:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:13,188 INFO L225 Difference]: With dead ends: 693 [2020-12-21 23:11:13,189 INFO L226 Difference]: Without dead ends: 577 [2020-12-21 23:11:13,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:11:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2020-12-21 23:11:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 134. [2020-12-21 23:11:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 23:11:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2020-12-21 23:11:13,200 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 40 [2020-12-21 23:11:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:13,200 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2020-12-21 23:11:13,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:11:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2020-12-21 23:11:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 23:11:13,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:13,202 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-12-21 23:11:13,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-21 23:11:13,202 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:13,203 INFO L82 PathProgramCache]: Analyzing trace with hash -565879240, now seen corresponding path program 1 times [2020-12-21 23:11:13,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:13,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808558039] [2020-12-21 23:11:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 23:11:13,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808558039] [2020-12-21 23:11:13,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:13,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:11:13,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306453063] [2020-12-21 23:11:13,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:11:13,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:11:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:11:13,244 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand 3 states. [2020-12-21 23:11:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:13,258 INFO L93 Difference]: Finished difference Result 194 states and 246 transitions. [2020-12-21 23:11:13,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:11:13,259 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-21 23:11:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:13,260 INFO L225 Difference]: With dead ends: 194 [2020-12-21 23:11:13,260 INFO L226 Difference]: Without dead ends: 162 [2020-12-21 23:11:13,261 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 23:11:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-21 23:11:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-12-21 23:11:13,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-21 23:11:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2020-12-21 23:11:13,270 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 45 [2020-12-21 23:11:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:13,270 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2020-12-21 23:11:13,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:11:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2020-12-21 23:11:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 23:11:13,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:13,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2020-12-21 23:11:13,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-21 23:11:13,272 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash -543246986, now seen corresponding path program 1 times [2020-12-21 23:11:13,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:13,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755988933] [2020-12-21 23:11:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 23:11:13,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755988933] [2020-12-21 23:11:13,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283931665] [2020-12-21 23:11:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:11:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 23:11:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 23:11:13,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:13,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-12-21 23:11:13,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353961376] [2020-12-21 23:11:13,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:11:13,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:11:13,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:13,598 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand 5 states. [2020-12-21 23:11:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:13,830 INFO L93 Difference]: Finished difference Result 486 states and 625 transitions. [2020-12-21 23:11:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 23:11:13,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-12-21 23:11:13,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:13,833 INFO L225 Difference]: With dead ends: 486 [2020-12-21 23:11:13,833 INFO L226 Difference]: Without dead ends: 309 [2020-12-21 23:11:13,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:11:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-21 23:11:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 284. [2020-12-21 23:11:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-12-21 23:11:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 361 transitions. [2020-12-21 23:11:13,847 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 361 transitions. Word has length 45 [2020-12-21 23:11:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:13,848 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 361 transitions. [2020-12-21 23:11:13,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:11:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 361 transitions. [2020-12-21 23:11:13,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 23:11:13,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:13,849 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:14,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:11:14,063 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:14,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1776534260, now seen corresponding path program 1 times [2020-12-21 23:11:14,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:14,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36257216] [2020-12-21 23:11:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 23:11:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36257216] [2020-12-21 23:11:14,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401596153] [2020-12-21 23:11:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:11:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:14,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 23:11:14,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 23:11:14,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:14,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2020-12-21 23:11:14,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799231148] [2020-12-21 23:11:14,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:11:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:11:14,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:11:14,614 INFO L87 Difference]: Start difference. First operand 284 states and 361 transitions. Second operand 6 states. [2020-12-21 23:11:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:15,151 INFO L93 Difference]: Finished difference Result 793 states and 1031 transitions. [2020-12-21 23:11:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 23:11:15,151 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 23:11:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:15,155 INFO L225 Difference]: With dead ends: 793 [2020-12-21 23:11:15,155 INFO L226 Difference]: Without dead ends: 516 [2020-12-21 23:11:15,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:11:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-12-21 23:11:15,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 435. [2020-12-21 23:11:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-21 23:11:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 552 transitions. [2020-12-21 23:11:15,179 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 552 transitions. Word has length 46 [2020-12-21 23:11:15,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:15,180 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 552 transitions. [2020-12-21 23:11:15,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:11:15,180 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 552 transitions. [2020-12-21 23:11:15,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 23:11:15,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:15,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:15,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 23:11:15,396 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:15,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1065595819, now seen corresponding path program 1 times [2020-12-21 23:11:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:15,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375464340] [2020-12-21 23:11:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 23:11:15,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375464340] [2020-12-21 23:11:15,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:11:15,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-21 23:11:15,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188242299] [2020-12-21 23:11:15,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 23:11:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 23:11:15,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:15,576 INFO L87 Difference]: Start difference. First operand 435 states and 552 transitions. Second operand 7 states. [2020-12-21 23:11:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:16,456 INFO L93 Difference]: Finished difference Result 2163 states and 2715 transitions. [2020-12-21 23:11:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 23:11:16,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-12-21 23:11:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:16,467 INFO L225 Difference]: With dead ends: 2163 [2020-12-21 23:11:16,467 INFO L226 Difference]: Without dead ends: 1781 [2020-12-21 23:11:16,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-21 23:11:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-12-21 23:11:16,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 423. [2020-12-21 23:11:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-12-21 23:11:16,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 540 transitions. [2020-12-21 23:11:16,503 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 540 transitions. Word has length 47 [2020-12-21 23:11:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:16,503 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 540 transitions. [2020-12-21 23:11:16,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 23:11:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 540 transitions. [2020-12-21 23:11:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 23:11:16,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:16,505 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:16,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-21 23:11:16,508 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:16,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1389589642, now seen corresponding path program 1 times [2020-12-21 23:11:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:16,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139902572] [2020-12-21 23:11:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 23:11:16,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139902572] [2020-12-21 23:11:16,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427859473] [2020-12-21 23:11:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 23:11:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 23:11:16,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 23:11:16,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:16,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2020-12-21 23:11:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67677419] [2020-12-21 23:11:16,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:11:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:11:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:11:16,812 INFO L87 Difference]: Start difference. First operand 423 states and 540 transitions. Second operand 4 states. [2020-12-21 23:11:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:16,966 INFO L93 Difference]: Finished difference Result 1313 states and 1679 transitions. [2020-12-21 23:11:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:11:16,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-12-21 23:11:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:16,971 INFO L225 Difference]: With dead ends: 1313 [2020-12-21 23:11:16,971 INFO L226 Difference]: Without dead ends: 865 [2020-12-21 23:11:16,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:11:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2020-12-21 23:11:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 772. [2020-12-21 23:11:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2020-12-21 23:11:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 975 transitions. [2020-12-21 23:11:17,026 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 975 transitions. Word has length 49 [2020-12-21 23:11:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:17,026 INFO L481 AbstractCegarLoop]: Abstraction has 772 states and 975 transitions. [2020-12-21 23:11:17,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:11:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 975 transitions. [2020-12-21 23:11:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 23:11:17,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:17,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:17,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:11:17,243 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:17,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2126140849, now seen corresponding path program 1 times [2020-12-21 23:11:17,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:17,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872175190] [2020-12-21 23:11:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 23:11:17,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872175190] [2020-12-21 23:11:17,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676716626] [2020-12-21 23:11:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:11:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:17,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 23:11:17,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 23:11:17,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:17,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2020-12-21 23:11:17,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53663457] [2020-12-21 23:11:17,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 23:11:17,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:17,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 23:11:17,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-21 23:11:17,790 INFO L87 Difference]: Start difference. First operand 772 states and 975 transitions. Second operand 5 states. [2020-12-21 23:11:18,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:18,165 INFO L93 Difference]: Finished difference Result 1738 states and 2210 transitions. [2020-12-21 23:11:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 23:11:18,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-12-21 23:11:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:18,173 INFO L225 Difference]: With dead ends: 1738 [2020-12-21 23:11:18,173 INFO L226 Difference]: Without dead ends: 1313 [2020-12-21 23:11:18,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:11:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2020-12-21 23:11:18,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1113. [2020-12-21 23:11:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1113 states. [2020-12-21 23:11:18,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1401 transitions. [2020-12-21 23:11:18,247 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1401 transitions. Word has length 50 [2020-12-21 23:11:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:18,249 INFO L481 AbstractCegarLoop]: Abstraction has 1113 states and 1401 transitions. [2020-12-21 23:11:18,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 23:11:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1401 transitions. [2020-12-21 23:11:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 23:11:18,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:18,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:18,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 23:11:18,456 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:18,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:18,457 INFO L82 PathProgramCache]: Analyzing trace with hash 48257313, now seen corresponding path program 1 times [2020-12-21 23:11:18,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:18,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331082030] [2020-12-21 23:11:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 23:11:18,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331082030] [2020-12-21 23:11:18,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367328468] [2020-12-21 23:11:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:11:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:11:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 23:11:18,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:11:18,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-21 23:11:18,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:11:18,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 23:11:18,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21103560] [2020-12-21 23:11:18,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 23:11:18,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:11:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 23:11:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-21 23:11:18,883 INFO L87 Difference]: Start difference. First operand 1113 states and 1401 transitions. Second operand 8 states. [2020-12-21 23:11:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:11:20,025 INFO L93 Difference]: Finished difference Result 2721 states and 3446 transitions. [2020-12-21 23:11:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 23:11:20,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-12-21 23:11:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:11:20,038 INFO L225 Difference]: With dead ends: 2721 [2020-12-21 23:11:20,039 INFO L226 Difference]: Without dead ends: 2297 [2020-12-21 23:11:20,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-21 23:11:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2020-12-21 23:11:20,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1804. [2020-12-21 23:11:20,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1804 states. [2020-12-21 23:11:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2278 transitions. [2020-12-21 23:11:20,132 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2278 transitions. Word has length 51 [2020-12-21 23:11:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:11:20,132 INFO L481 AbstractCegarLoop]: Abstraction has 1804 states and 2278 transitions. [2020-12-21 23:11:20,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 23:11:20,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2278 transitions. [2020-12-21 23:11:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 23:11:20,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:11:20,135 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:11:20,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 23:11:20,339 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:11:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:11:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash 945650591, now seen corresponding path program 1 times [2020-12-21 23:11:20,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:11:20,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289350618] [2020-12-21 23:11:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:11:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:11:20,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:11:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-21 23:11:20,384 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-21 23:11:20,412 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-21 23:11:20,412 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-21 23:11:20,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-21 23:11:20,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:11:20 BoogieIcfgContainer [2020-12-21 23:11:20,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-21 23:11:20,477 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-21 23:11:20,477 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-21 23:11:20,477 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-21 23:11:20,478 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:11:05" (3/4) ... [2020-12-21 23:11:20,481 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-21 23:11:20,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-21 23:11:20,484 INFO L168 Benchmark]: Toolchain (without parser) took 16618.63 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.5 MB in the beginning and 94.9 MB in the end (delta: 32.5 MB). Peak memory consumption was 100.2 MB. Max. memory is 8.0 GB. [2020-12-21 23:11:20,484 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:11:20,485 INFO L168 Benchmark]: CACSL2BoogieTranslator took 567.93 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 115.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-21 23:11:20,485 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-21 23:11:20,486 INFO L168 Benchmark]: Boogie Preprocessor took 75.05 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 112.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-21 23:11:20,487 INFO L168 Benchmark]: RCFGBuilder took 669.60 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 124.8 MB in the end (delta: -12.1 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. [2020-12-21 23:11:20,487 INFO L168 Benchmark]: TraceAbstraction took 15207.78 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 124.2 MB in the beginning and 95.5 MB in the end (delta: 28.8 MB). Peak memory consumption was 96.4 MB. Max. memory is 8.0 GB. [2020-12-21 23:11:20,488 INFO L168 Benchmark]: Witness Printer took 4.81 ms. Allocated memory is still 218.1 MB. Free memory was 95.5 MB in the beginning and 94.9 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-21 23:11:20,491 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 567.93 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 115.8 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 83.07 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.05 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 112.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 669.60 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 124.8 MB in the end (delta: -12.1 MB). Peak memory consumption was 15.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15207.78 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 124.2 MB in the beginning and 95.5 MB in the end (delta: 28.8 MB). Peak memory consumption was 96.4 MB. Max. memory is 8.0 GB. * Witness Printer took 4.81 ms. Allocated memory is still 218.1 MB. Free memory was 95.5 MB in the beginning and 94.9 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 108. Possible FailurePath: [L116] unsigned int a, b, r; [L118] a = __VERIFIER_nondet_uint() [L119] b = __VERIFIER_nondet_uint() [L34] unsigned char a0, a1, a2, a3; [L35] unsigned char b0, b1, b2, b3; [L36] unsigned char r0, r1, r2, r3; [L37] unsigned short carry; [L38] unsigned short partial_sum; [L39] unsigned int r; [L40] unsigned char i; [L41] unsigned char na, nb; [L42] a0 = a [L43] a1 = a >> 8 [L44] a2 = a >> 16U [L45] a3 = a >> 24U [L46] b0 = b [L47] b1 = b >> 8U [L48] b2 = b >> 16U [L49] b3 = b >> 24U [L50] na = (unsigned char)4 [L51] COND TRUE a3 == (unsigned char)0 [L52] na = na - 1 [L53] COND TRUE a2 == (unsigned char)0 [L54] na = na - 1 [L55] COND TRUE a1 == (unsigned char)0 [L56] na = na - 1 [L60] nb = (unsigned char)4 [L61] COND TRUE b3 == (unsigned char)0 [L62] nb = nb - 1 [L63] COND TRUE b2 == (unsigned char)0 [L64] nb = nb - 1 [L65] COND TRUE b1 == (unsigned char)0 [L66] nb = nb - 1 [L70] carry = (unsigned short)0 [L71] i = (unsigned char)0 [L72] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L73] partial_sum = carry [L74] carry = (unsigned short)0 [L75] COND TRUE i < na [L76] COND TRUE i == (unsigned char)0 [L76] partial_sum = partial_sum + a0 [L77] COND FALSE !(i == (unsigned char)1) [L78] COND FALSE !(i == (unsigned char)2) [L79] COND FALSE !(i == (unsigned char)3) [L81] COND TRUE i < nb [L82] COND TRUE i == (unsigned char)0 [L82] partial_sum = partial_sum + b0 [L83] COND FALSE !(i == (unsigned char)1) [L84] COND FALSE !(i == (unsigned char)2) [L85] COND FALSE !(i == (unsigned char)3) [L87] COND FALSE !(partial_sum > ((unsigned char)254)) [L91] COND TRUE i == (unsigned char)0 [L91] r0 = (unsigned char)partial_sum [L92] COND FALSE !(i == (unsigned char)1) [L93] COND FALSE !(i == (unsigned char)2) [L94] COND FALSE !(i == (unsigned char)3) [L96] i = i + (unsigned char)1 [L72] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND TRUE i == (unsigned char)1 [L101] r1 = (unsigned char)0 [L102] COND FALSE !(i == (unsigned char)2) [L103] COND FALSE !(i == (unsigned char)3) [L105] i = i + (unsigned char)1 [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND TRUE i == (unsigned char)2 [L102] r2 = (unsigned char)0 [L103] COND FALSE !(i == (unsigned char)3) [L105] i = i + (unsigned char)1 [L99] COND TRUE i < (unsigned char)4 [L100] COND FALSE !(i == (unsigned char)0) [L101] COND FALSE !(i == (unsigned char)1) [L102] COND FALSE !(i == (unsigned char)2) [L103] COND TRUE i == (unsigned char)3 [L103] r3 = (unsigned char)0 [L105] i = i + (unsigned char)1 [L99] COND FALSE !(i < (unsigned char)4) [L108] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L110] return r; [L121] r = mp_add(a, b) [L16] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.0s, OverallIterations: 19, TraceHistogramMax: 4, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1569 SDtfs, 2297 SDslu, 2827 SDs, 0 SdLazy, 3989 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 419 GetRequests, 288 SyntacticMatches, 33 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1804occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 18 MinimizatonAttempts, 3762 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 948 NumberOfCodeBlocks, 948 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 872 ConstructedInterpolants, 0 QuantifiedInterpolants, 199597 SizeOfPredicates, 15 NumberOfNonLiveVariables, 919 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 25 InterpolantComputations, 17 PerfectInterpolantSequences, 429/464 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...