/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:05:15,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:05:15,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:05:15,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:05:15,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:05:15,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:05:15,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:05:15,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:05:15,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:05:15,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:05:15,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:05:15,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:05:15,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:05:15,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:05:15,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:05:15,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:05:15,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:05:15,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:05:15,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:05:15,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:05:15,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:05:15,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:05:15,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:05:15,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:05:15,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:05:15,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:05:15,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:05:15,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:05:15,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:05:15,382 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:05:15,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:05:15,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:05:15,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:05:15,385 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:05:15,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:05:15,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:05:15,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:05:15,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:05:15,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:05:15,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:05:15,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:05:15,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:05:15,387 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:05:15,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:05:15,388 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:05:15,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:05:15,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:05:15,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:05:15,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:05:15,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:05:15,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:05:15,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:05:15,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:05:15,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:05:15,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:05:15,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:05:15,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:05:15,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:05:15,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:05:15,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:05:15,699 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:05:15,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:05:15,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:05:15,708 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:05:15,709 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 17:05:15,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6e6484dc/13114efef72d4f9cb3b2c673687f1e58/FLAG305c9f19b [2020-08-18 17:05:16,299 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:05:16,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-18 17:05:16,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6e6484dc/13114efef72d4f9cb3b2c673687f1e58/FLAG305c9f19b [2020-08-18 17:05:16,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6e6484dc/13114efef72d4f9cb3b2c673687f1e58 [2020-08-18 17:05:16,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:05:16,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:05:16,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:16,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:05:16,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:05:16,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29074e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16, skipping insertion in model container [2020-08-18 17:05:16,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:16,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:05:16,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:05:16,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:16,903 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:05:16,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:05:16,947 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:05:16,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16 WrapperNode [2020-08-18 17:05:16,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:05:16,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:05:16,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:05:16,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:05:17,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:17,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:17,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:17,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:17,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:17,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:17,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... [2020-08-18 17:05:17,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:05:17,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:05:17,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:05:17,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:05:17,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 17:05:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:05:17,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:05:17,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:05:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:05:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:05:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:05:17,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:05:17,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:05:17,458 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:05:17,459 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:05:17,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:17 BoogieIcfgContainer [2020-08-18 17:05:17,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:05:17,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:05:17,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:05:17,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:05:17,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:05:16" (1/3) ... [2020-08-18 17:05:17,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a571808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:17, skipping insertion in model container [2020-08-18 17:05:17,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:05:16" (2/3) ... [2020-08-18 17:05:17,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a571808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:05:17, skipping insertion in model container [2020-08-18 17:05:17,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:05:17" (3/3) ... [2020-08-18 17:05:17,490 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-18 17:05:17,500 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:05:17,508 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:05:17,525 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:05:17,552 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:05:17,552 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:05:17,552 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:05:17,552 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:05:17,553 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:05:17,553 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:05:17,553 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:05:17,553 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:05:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-18 17:05:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:05:17,587 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:17,588 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] [2020-08-18 17:05:17,588 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-18 17:05:17,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:17,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405986447] [2020-08-18 17:05:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:17,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405986447] [2020-08-18 17:05:17,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:17,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:17,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224561510] [2020-08-18 17:05:17,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:17,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:17,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:17,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:17,848 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-18 17:05:17,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:17,911 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-18 17:05:17,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:17,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:05:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:17,926 INFO L225 Difference]: With dead ends: 87 [2020-08-18 17:05:17,927 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 17:05:17,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 17:05:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-18 17:05:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 17:05:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-18 17:05:17,982 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-18 17:05:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:17,983 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-18 17:05:17,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-18 17:05:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 17:05:17,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:17,985 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] [2020-08-18 17:05:17,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:05:17,986 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:17,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-18 17:05:17,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:17,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818117354] [2020-08-18 17:05:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818117354] [2020-08-18 17:05:18,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223429012] [2020-08-18 17:05:18,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,062 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-18 17:05:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,090 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-18 17:05:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 17:05:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,093 INFO L225 Difference]: With dead ends: 117 [2020-08-18 17:05:18,093 INFO L226 Difference]: Without dead ends: 72 [2020-08-18 17:05:18,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-18 17:05:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-18 17:05:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 17:05:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-18 17:05:18,109 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-18 17:05:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,109 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-18 17:05:18,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,110 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-18 17:05:18,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:05:18,111 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:05:18,112 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-18 17:05:18,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531498126] [2020-08-18 17:05:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531498126] [2020-08-18 17:05:18,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827692034] [2020-08-18 17:05:18,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,175 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-18 17:05:18,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,212 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-18 17:05:18,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:05:18,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,216 INFO L225 Difference]: With dead ends: 108 [2020-08-18 17:05:18,216 INFO L226 Difference]: Without dead ends: 75 [2020-08-18 17:05:18,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-18 17:05:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-18 17:05:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 17:05:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-18 17:05:18,231 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-18 17:05:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,232 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-18 17:05:18,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-18 17:05:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:05:18,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:05:18,234 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-18 17:05:18,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320001150] [2020-08-18 17:05:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320001150] [2020-08-18 17:05:18,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192475631] [2020-08-18 17:05:18,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,290 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-18 17:05:18,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,312 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-18 17:05:18,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:05:18,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,315 INFO L225 Difference]: With dead ends: 136 [2020-08-18 17:05:18,316 INFO L226 Difference]: Without dead ends: 134 [2020-08-18 17:05:18,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-18 17:05:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-18 17:05:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 17:05:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-18 17:05:18,329 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-18 17:05:18,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,330 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-18 17:05:18,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-18 17:05:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:05:18,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:05:18,332 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-18 17:05:18,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741690217] [2020-08-18 17:05:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741690217] [2020-08-18 17:05:18,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701046788] [2020-08-18 17:05:18,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,379 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-18 17:05:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,424 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-18 17:05:18,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:05:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,429 INFO L225 Difference]: With dead ends: 224 [2020-08-18 17:05:18,429 INFO L226 Difference]: Without dead ends: 136 [2020-08-18 17:05:18,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-18 17:05:18,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-18 17:05:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-18 17:05:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-18 17:05:18,460 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-18 17:05:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,460 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-18 17:05:18,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-18 17:05:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:05:18,462 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:05:18,465 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-18 17:05:18,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982393599] [2020-08-18 17:05:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982393599] [2020-08-18 17:05:18,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296290278] [2020-08-18 17:05:18,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,555 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-18 17:05:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,580 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-18 17:05:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:05:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,583 INFO L225 Difference]: With dead ends: 201 [2020-08-18 17:05:18,583 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 17:05:18,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 17:05:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-18 17:05:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 17:05:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-18 17:05:18,616 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-18 17:05:18,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,620 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-18 17:05:18,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,620 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-18 17:05:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:05:18,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:05:18,624 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-18 17:05:18,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113400959] [2020-08-18 17:05:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113400959] [2020-08-18 17:05:18,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734936783] [2020-08-18 17:05:18,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,668 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-18 17:05:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,694 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-18 17:05:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:05:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,699 INFO L225 Difference]: With dead ends: 252 [2020-08-18 17:05:18,699 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 17:05:18,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 17:05:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-18 17:05:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 17:05:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-18 17:05:18,730 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-18 17:05:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,730 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-18 17:05:18,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-18 17:05:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:05:18,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:05:18,734 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-18 17:05:18,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839747045] [2020-08-18 17:05:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839747045] [2020-08-18 17:05:18,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420373060] [2020-08-18 17:05:18,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,771 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-18 17:05:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,814 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-18 17:05:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:05:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,818 INFO L225 Difference]: With dead ends: 432 [2020-08-18 17:05:18,818 INFO L226 Difference]: Without dead ends: 258 [2020-08-18 17:05:18,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-18 17:05:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-18 17:05:18,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-18 17:05:18,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-18 17:05:18,833 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-18 17:05:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,834 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-18 17:05:18,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-18 17:05:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:05:18,836 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:05:18,836 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-18 17:05:18,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772747794] [2020-08-18 17:05:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772747794] [2020-08-18 17:05:18,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136103423] [2020-08-18 17:05:18,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,867 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-18 17:05:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,891 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-18 17:05:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:05:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,894 INFO L225 Difference]: With dead ends: 384 [2020-08-18 17:05:18,894 INFO L226 Difference]: Without dead ends: 262 [2020-08-18 17:05:18,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-18 17:05:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-18 17:05:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-18 17:05:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-18 17:05:18,907 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-18 17:05:18,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,907 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-18 17:05:18,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,908 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-18 17:05:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:05:18,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:05:18,909 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-18 17:05:18,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71369659] [2020-08-18 17:05:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:18,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71369659] [2020-08-18 17:05:18,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:18,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:18,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143705326] [2020-08-18 17:05:18,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:18,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:18,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:18,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,940 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-18 17:05:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:18,962 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-18 17:05:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:18,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:05:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:18,966 INFO L225 Difference]: With dead ends: 476 [2020-08-18 17:05:18,966 INFO L226 Difference]: Without dead ends: 474 [2020-08-18 17:05:18,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-18 17:05:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-18 17:05:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 17:05:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-18 17:05:18,983 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-18 17:05:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:18,983 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-18 17:05:18,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-18 17:05:18,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:05:18,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:18,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:18,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:05:18,986 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-18 17:05:18,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:18,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208460976] [2020-08-18 17:05:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208460976] [2020-08-18 17:05:19,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740490401] [2020-08-18 17:05:19,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,012 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-18 17:05:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,040 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-18 17:05:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:05:19,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,045 INFO L225 Difference]: With dead ends: 844 [2020-08-18 17:05:19,045 INFO L226 Difference]: Without dead ends: 498 [2020-08-18 17:05:19,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-18 17:05:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-18 17:05:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-18 17:05:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-18 17:05:19,067 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-18 17:05:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,067 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-18 17:05:19,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-18 17:05:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:05:19,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:19,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:05:19,070 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,071 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-18 17:05:19,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909302099] [2020-08-18 17:05:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909302099] [2020-08-18 17:05:19,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551445554] [2020-08-18 17:05:19,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,102 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-18 17:05:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,127 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-18 17:05:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:05:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,131 INFO L225 Difference]: With dead ends: 744 [2020-08-18 17:05:19,132 INFO L226 Difference]: Without dead ends: 506 [2020-08-18 17:05:19,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-18 17:05:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-18 17:05:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-18 17:05:19,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-18 17:05:19,153 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-18 17:05:19,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,153 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-18 17:05:19,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-18 17:05:19,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:05:19,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:19,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:05:19,156 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-18 17:05:19,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183072635] [2020-08-18 17:05:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183072635] [2020-08-18 17:05:19,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577381072] [2020-08-18 17:05:19,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,185 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-18 17:05:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,213 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-18 17:05:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:05:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,219 INFO L225 Difference]: With dead ends: 908 [2020-08-18 17:05:19,220 INFO L226 Difference]: Without dead ends: 906 [2020-08-18 17:05:19,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-18 17:05:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-18 17:05:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-18 17:05:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-18 17:05:19,250 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-18 17:05:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,250 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-18 17:05:19,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-18 17:05:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:05:19,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:19,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:05:19,253 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-18 17:05:19,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598116616] [2020-08-18 17:05:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598116616] [2020-08-18 17:05:19,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807869734] [2020-08-18 17:05:19,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,284 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-18 17:05:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,326 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-18 17:05:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:05:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,332 INFO L225 Difference]: With dead ends: 1660 [2020-08-18 17:05:19,333 INFO L226 Difference]: Without dead ends: 970 [2020-08-18 17:05:19,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-18 17:05:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-18 17:05:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-18 17:05:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-18 17:05:19,373 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-18 17:05:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,373 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-18 17:05:19,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-18 17:05:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:05:19,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:19,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:05:19,376 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-18 17:05:19,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708940115] [2020-08-18 17:05:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708940115] [2020-08-18 17:05:19,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776213070] [2020-08-18 17:05:19,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,422 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-18 17:05:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,451 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-18 17:05:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:05:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,457 INFO L225 Difference]: With dead ends: 1452 [2020-08-18 17:05:19,457 INFO L226 Difference]: Without dead ends: 986 [2020-08-18 17:05:19,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-18 17:05:19,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-18 17:05:19,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-18 17:05:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-18 17:05:19,490 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-18 17:05:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,491 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-18 17:05:19,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-18 17:05:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:05:19,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:19,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:05:19,493 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-18 17:05:19,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793998575] [2020-08-18 17:05:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793998575] [2020-08-18 17:05:19,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121890292] [2020-08-18 17:05:19,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,519 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-18 17:05:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,554 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-18 17:05:19,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:05:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,564 INFO L225 Difference]: With dead ends: 1740 [2020-08-18 17:05:19,564 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 17:05:19,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 17:05:19,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-18 17:05:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-18 17:05:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-18 17:05:19,609 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-18 17:05:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,610 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-18 17:05:19,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-18 17:05:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:05:19,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,613 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:19,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:05:19,613 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-18 17:05:19,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202451092] [2020-08-18 17:05:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202451092] [2020-08-18 17:05:19,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765854706] [2020-08-18 17:05:19,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,636 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-18 17:05:19,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,684 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-18 17:05:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:05:19,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,693 INFO L225 Difference]: With dead ends: 3276 [2020-08-18 17:05:19,694 INFO L226 Difference]: Without dead ends: 1898 [2020-08-18 17:05:19,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-18 17:05:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-18 17:05:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-18 17:05:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-18 17:05:19,762 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-18 17:05:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,763 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-18 17:05:19,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-18 17:05:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:05:19,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:19,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:19,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:05:19,769 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-18 17:05:19,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:19,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386676845] [2020-08-18 17:05:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:19,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386676845] [2020-08-18 17:05:19,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:19,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:19,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332462642] [2020-08-18 17:05:19,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:19,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:19,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,807 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-18 17:05:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:19,877 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-18 17:05:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:19,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 17:05:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:19,890 INFO L225 Difference]: With dead ends: 2844 [2020-08-18 17:05:19,891 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 17:05:19,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 17:05:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-18 17:05:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-18 17:05:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-18 17:05:19,972 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-18 17:05:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:19,972 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-18 17:05:19,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-18 17:05:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:05:20,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:20,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:05:20,022 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-18 17:05:20,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534665759] [2020-08-18 17:05:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534665759] [2020-08-18 17:05:20,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996558983] [2020-08-18 17:05:20,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,058 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-18 17:05:20,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,126 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-18 17:05:20,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:20,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 17:05:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,145 INFO L225 Difference]: With dead ends: 3340 [2020-08-18 17:05:20,145 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 17:05:20,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 17:05:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-18 17:05:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-18 17:05:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-18 17:05:20,235 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-18 17:05:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,236 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-18 17:05:20,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-18 17:05:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:05:20,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:20,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:05:20,242 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-18 17:05:20,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726809145] [2020-08-18 17:05:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726809145] [2020-08-18 17:05:20,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318156526] [2020-08-18 17:05:20,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,274 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-18 17:05:20,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,346 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-18 17:05:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:20,346 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 17:05:20,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,364 INFO L225 Difference]: With dead ends: 6476 [2020-08-18 17:05:20,364 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 17:05:20,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 17:05:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-18 17:05:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-18 17:05:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-18 17:05:20,481 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-18 17:05:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,482 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-18 17:05:20,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-18 17:05:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:05:20,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:20,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:05:20,490 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-18 17:05:20,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205497240] [2020-08-18 17:05:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205497240] [2020-08-18 17:05:20,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300593283] [2020-08-18 17:05:20,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,548 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-18 17:05:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,609 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-18 17:05:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:20,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 17:05:20,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,627 INFO L225 Difference]: With dead ends: 5580 [2020-08-18 17:05:20,627 INFO L226 Difference]: Without dead ends: 3786 [2020-08-18 17:05:20,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-18 17:05:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-18 17:05:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-18 17:05:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-18 17:05:20,748 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-18 17:05:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:20,748 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-18 17:05:20,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-18 17:05:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:05:20,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:20,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:20,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:05:20,754 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:20,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:20,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-18 17:05:20,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:20,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037078320] [2020-08-18 17:05:20,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:20,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037078320] [2020-08-18 17:05:20,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:20,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:20,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671729671] [2020-08-18 17:05:20,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:20,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:20,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:20,782 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-18 17:05:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:20,915 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-18 17:05:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:20,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 17:05:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:20,974 INFO L225 Difference]: With dead ends: 10956 [2020-08-18 17:05:20,974 INFO L226 Difference]: Without dead ends: 7306 [2020-08-18 17:05:20,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-18 17:05:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-18 17:05:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 17:05:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-18 17:05:21,304 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-18 17:05:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,305 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-18 17:05:21,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-18 17:05:21,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:05:21,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:21,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:05:21,315 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-18 17:05:21,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208240818] [2020-08-18 17:05:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:21,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208240818] [2020-08-18 17:05:21,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:21,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157081201] [2020-08-18 17:05:21,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:21,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:21,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,346 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-18 17:05:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:21,480 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-18 17:05:21,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:21,481 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 17:05:21,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:21,498 INFO L225 Difference]: With dead ends: 8076 [2020-08-18 17:05:21,498 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 17:05:21,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 17:05:21,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-18 17:05:21,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-18 17:05:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-18 17:05:21,701 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-18 17:05:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:21,702 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-18 17:05:21,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-18 17:05:21,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:05:21,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:21,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:21,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:05:21,715 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:21,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-18 17:05:21,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:21,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061500918] [2020-08-18 17:05:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:21,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061500918] [2020-08-18 17:05:21,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:21,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:21,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290538072] [2020-08-18 17:05:21,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:21,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:21,748 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-18 17:05:22,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,048 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-18 17:05:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:22,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 17:05:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,071 INFO L225 Difference]: With dead ends: 12172 [2020-08-18 17:05:22,071 INFO L226 Difference]: Without dead ends: 12170 [2020-08-18 17:05:22,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-18 17:05:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-18 17:05:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-18 17:05:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-18 17:05:22,337 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-18 17:05:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:22,338 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-18 17:05:22,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-18 17:05:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:05:22,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:22,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:22,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 17:05:22,358 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:22,358 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-18 17:05:22,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:22,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270223468] [2020-08-18 17:05:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:22,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270223468] [2020-08-18 17:05:22,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:22,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:22,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223432157] [2020-08-18 17:05:22,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:22,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:22,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:22,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,409 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-18 17:05:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:22,777 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-18 17:05:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:22,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 17:05:22,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:22,804 INFO L225 Difference]: With dead ends: 25228 [2020-08-18 17:05:22,805 INFO L226 Difference]: Without dead ends: 14218 [2020-08-18 17:05:22,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-18 17:05:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-18 17:05:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-18 17:05:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-18 17:05:23,135 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-18 17:05:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,136 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-18 17:05:23,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-18 17:05:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 17:05:23,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:23,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 17:05:23,156 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-18 17:05:23,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924142108] [2020-08-18 17:05:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:23,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924142108] [2020-08-18 17:05:23,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868458747] [2020-08-18 17:05:23,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,184 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-18 17:05:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:23,502 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-18 17:05:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:23,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 17:05:23,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:23,529 INFO L225 Difference]: With dead ends: 21516 [2020-08-18 17:05:23,529 INFO L226 Difference]: Without dead ends: 14602 [2020-08-18 17:05:23,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-18 17:05:23,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-18 17:05:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-18 17:05:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-18 17:05:23,832 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-18 17:05:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:23,832 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-18 17:05:23,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-18 17:05:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 17:05:23,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:23,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:23,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 17:05:23,851 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-18 17:05:23,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:23,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398107965] [2020-08-18 17:05:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:23,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398107965] [2020-08-18 17:05:23,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:23,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:23,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293351649] [2020-08-18 17:05:23,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:23,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:23,873 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-18 17:05:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:24,591 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-18 17:05:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:24,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 17:05:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:24,630 INFO L225 Difference]: With dead ends: 23562 [2020-08-18 17:05:24,630 INFO L226 Difference]: Without dead ends: 23560 [2020-08-18 17:05:24,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-18 17:05:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-18 17:05:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-18 17:05:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-18 17:05:24,990 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-18 17:05:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:24,990 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-18 17:05:24,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-18 17:05:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 17:05:25,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:05:25,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:05:25,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 17:05:25,025 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:05:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:05:25,026 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-18 17:05:25,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:05:25,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188475258] [2020-08-18 17:05:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:05:25,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:05:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:05:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:05:25,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188475258] [2020-08-18 17:05:25,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:05:25,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:05:25,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462907357] [2020-08-18 17:05:25,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:05:25,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:05:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:05:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:25,057 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-18 17:05:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:05:25,450 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-18 17:05:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:05:25,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 17:05:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:05:25,451 INFO L225 Difference]: With dead ends: 50184 [2020-08-18 17:05:25,451 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:05:25,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:05:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:05:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:05:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:05:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:05:25,512 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-18 17:05:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:05:25,513 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:05:25,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:05:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:05:25,513 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:05:25,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 17:05:25,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:05:25,550 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:05:25,551 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:05:25,551 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:05:25,551 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:05:25,551 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:05:25,551 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:05:25,551 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-18 17:05:25,551 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-18 17:05:25,552 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,553 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,553 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,553 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-18 17:05:25,553 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-18 17:05:25,553 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-18 17:05:25,553 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-18 17:05:25,553 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-18 17:05:25,554 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-18 17:05:25,554 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-18 17:05:25,554 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,554 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,554 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-18 17:05:25,554 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-18 17:05:25,554 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,554 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,555 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-18 17:05:25,556 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-18 17:05:25,556 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,556 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-18 17:05:25,556 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-18 17:05:25,556 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-18 17:05:25,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:05:25 BoogieIcfgContainer [2020-08-18 17:05:25,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:05:25,572 INFO L168 Benchmark]: Toolchain (without parser) took 8903.69 ms. Allocated memory was 141.0 MB in the beginning and 669.0 MB in the end (delta: 528.0 MB). Free memory was 104.6 MB in the beginning and 445.6 MB in the end (delta: -341.0 MB). Peak memory consumption was 187.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:25,573 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:05:25,573 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.37 ms. Allocated memory is still 141.0 MB. Free memory was 104.4 MB in the beginning and 93.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:25,574 INFO L168 Benchmark]: Boogie Preprocessor took 125.59 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 181.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:25,574 INFO L168 Benchmark]: RCFGBuilder took 390.05 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 162.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:25,575 INFO L168 Benchmark]: TraceAbstraction took 8092.17 ms. Allocated memory was 204.5 MB in the beginning and 669.0 MB in the end (delta: 464.5 MB). Free memory was 162.6 MB in the beginning and 445.6 MB in the end (delta: -283.0 MB). Peak memory consumption was 181.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:05:25,577 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.37 ms. Allocated memory is still 141.0 MB. Free memory was 104.4 MB in the beginning and 93.5 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.59 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 93.5 MB in the beginning and 181.9 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 390.05 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 162.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8092.17 ms. Allocated memory was 204.5 MB in the beginning and 669.0 MB in the end (delta: 464.5 MB). Free memory was 162.6 MB in the beginning and 445.6 MB in the end (delta: -283.0 MB). Peak memory consumption was 181.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 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 proved your program to be correct! Received shutdown request...