/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 05:28:32,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 05:28:32,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 05:28:32,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 05:28:32,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 05:28:32,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 05:28:32,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 05:28:32,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 05:28:32,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 05:28:32,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 05:28:32,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 05:28:32,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 05:28:32,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 05:28:32,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 05:28:32,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 05:28:32,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 05:28:32,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 05:28:32,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 05:28:32,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 05:28:32,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 05:28:32,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 05:28:32,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 05:28:32,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 05:28:32,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 05:28:32,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 05:28:32,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 05:28:32,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 05:28:32,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 05:28:32,425 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 [2020-08-22 05:28:32,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 05:28:32,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 05:28:32,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 05:28:32,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 05:28:32,474 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 05:28:32,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 05:28:32,477 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 05:28:32,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 05:28:32,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 05:28:32,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 05:28:32,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 05:28:32,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 05:28:32,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 05:28:32,478 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 05:28:32,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 05:28:32,480 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 05:28:32,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 05:28:32,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 05:28:32,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 05:28:32,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 05:28:32,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 05:28:32,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 05:28:32,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 05:28:32,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 05:28:32,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 05:28:32,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 05:28:32,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 05:28:32,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 05:28:32,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 05:28:32,482 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-08-22 05:28:32,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 05:28:32,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 05:28:32,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 05:28:32,857 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 05:28:32,857 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 05:28:32,858 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 05:28:32,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f83ffb425/203ddd931dba4b229a24c2c12a0f083d/FLAGc542e60c1 [2020-08-22 05:28:33,385 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 05:28:33,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-22 05:28:33,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f83ffb425/203ddd931dba4b229a24c2c12a0f083d/FLAGc542e60c1 [2020-08-22 05:28:33,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f83ffb425/203ddd931dba4b229a24c2c12a0f083d [2020-08-22 05:28:33,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 05:28:33,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 05:28:33,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 05:28:33,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 05:28:33,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 05:28:33,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:28:33" (1/1) ... [2020-08-22 05:28:33,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cedd037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:33, skipping insertion in model container [2020-08-22 05:28:33,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:28:33" (1/1) ... [2020-08-22 05:28:33,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 05:28:33,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 05:28:33,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:28:33,964 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 05:28:33,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 05:28:34,015 INFO L208 MainTranslator]: Completed translation [2020-08-22 05:28:34,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34 WrapperNode [2020-08-22 05:28:34,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 05:28:34,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 05:28:34,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 05:28:34,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 05:28:34,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (1/1) ... [2020-08-22 05:28:34,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (1/1) ... [2020-08-22 05:28:34,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (1/1) ... [2020-08-22 05:28:34,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (1/1) ... [2020-08-22 05:28:34,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (1/1) ... [2020-08-22 05:28:34,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (1/1) ... [2020-08-22 05:28:34,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (1/1) ... [2020-08-22 05:28:34,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 05:28:34,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 05:28:34,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 05:28:34,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 05:28:34,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (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 [2020-08-22 05:28:34,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 05:28:34,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 05:28:34,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 05:28:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 05:28:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 05:28:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 05:28:34,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 05:28:34,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 05:28:34,514 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 05:28:34,515 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 05:28:34,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:28:34 BoogieIcfgContainer [2020-08-22 05:28:34,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 05:28:34,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 05:28:34,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 05:28:34,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 05:28:34,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:28:33" (1/3) ... [2020-08-22 05:28:34,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d918de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:28:34, skipping insertion in model container [2020-08-22 05:28:34,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:28:34" (2/3) ... [2020-08-22 05:28:34,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d918de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:28:34, skipping insertion in model container [2020-08-22 05:28:34,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:28:34" (3/3) ... [2020-08-22 05:28:34,529 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-22 05:28:34,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 05:28:34,552 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 05:28:34,578 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 05:28:34,608 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 05:28:34,608 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 05:28:34,608 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 05:28:34,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 05:28:34,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 05:28:34,609 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 05:28:34,609 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 05:28:34,609 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 05:28:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 05:28:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 05:28:34,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:34,643 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] [2020-08-22 05:28:34,643 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-22 05:28:34,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:34,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255108383] [2020-08-22 05:28:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:34,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:34,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255108383] [2020-08-22 05:28:34,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:34,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:34,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122631316] [2020-08-22 05:28:34,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:34,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:34,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:34,914 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-22 05:28:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:34,975 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-22 05:28:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:34,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 05:28:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:34,990 INFO L225 Difference]: With dead ends: 93 [2020-08-22 05:28:34,990 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 05:28:34,994 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 [2020-08-22 05:28:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 05:28:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-22 05:28:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 05:28:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-22 05:28:35,038 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-22 05:28:35,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,038 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-22 05:28:35,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-22 05:28:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 05:28:35,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,040 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] [2020-08-22 05:28:35,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 05:28:35,041 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-22 05:28:35,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768371744] [2020-08-22 05:28:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768371744] [2020-08-22 05:28:35,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025732752] [2020-08-22 05:28:35,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,127 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-22 05:28:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,202 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-22 05:28:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 05:28:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,205 INFO L225 Difference]: With dead ends: 127 [2020-08-22 05:28:35,205 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 05:28:35,207 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 [2020-08-22 05:28:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 05:28:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-22 05:28:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 05:28:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-22 05:28:35,219 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-22 05:28:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,220 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-22 05:28:35,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-22 05:28:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:35,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,222 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] [2020-08-22 05:28:35,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 05:28:35,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-22 05:28:35,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640706047] [2020-08-22 05:28:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640706047] [2020-08-22 05:28:35,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677702466] [2020-08-22 05:28:35,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,289 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-22 05:28:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,319 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-22 05:28:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 05:28:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,322 INFO L225 Difference]: With dead ends: 117 [2020-08-22 05:28:35,322 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 05:28:35,323 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 [2020-08-22 05:28:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 05:28:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-22 05:28:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 05:28:35,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-22 05:28:35,337 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-22 05:28:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,338 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-22 05:28:35,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-22 05:28:35,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:35,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,340 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] [2020-08-22 05:28:35,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 05:28:35,340 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-22 05:28:35,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933952092] [2020-08-22 05:28:35,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933952092] [2020-08-22 05:28:35,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973289149] [2020-08-22 05:28:35,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,425 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-22 05:28:35,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,451 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-22 05:28:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 05:28:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,454 INFO L225 Difference]: With dead ends: 148 [2020-08-22 05:28:35,454 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 05:28:35,454 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 [2020-08-22 05:28:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 05:28:35,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-22 05:28:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-22 05:28:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-22 05:28:35,468 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-22 05:28:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,469 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-22 05:28:35,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-22 05:28:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 05:28:35,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,471 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] [2020-08-22 05:28:35,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 05:28:35,471 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,472 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-22 05:28:35,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674325366] [2020-08-22 05:28:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674325366] [2020-08-22 05:28:35,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522739080] [2020-08-22 05:28:35,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,527 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-22 05:28:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,553 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-22 05:28:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 05:28:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,555 INFO L225 Difference]: With dead ends: 244 [2020-08-22 05:28:35,556 INFO L226 Difference]: Without dead ends: 148 [2020-08-22 05:28:35,557 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 [2020-08-22 05:28:35,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-22 05:28:35,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-22 05:28:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-22 05:28:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-22 05:28:35,572 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-22 05:28:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,573 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-22 05:28:35,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-22 05:28:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 05:28:35,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,575 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] [2020-08-22 05:28:35,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 05:28:35,575 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-22 05:28:35,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403837553] [2020-08-22 05:28:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403837553] [2020-08-22 05:28:35,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531226649] [2020-08-22 05:28:35,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,629 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-22 05:28:35,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,648 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-22 05:28:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 05:28:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,650 INFO L225 Difference]: With dead ends: 219 [2020-08-22 05:28:35,650 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 05:28:35,651 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 [2020-08-22 05:28:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 05:28:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-22 05:28:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-22 05:28:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-22 05:28:35,679 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-22 05:28:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,679 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-22 05:28:35,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-22 05:28:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 05:28:35,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,681 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] [2020-08-22 05:28:35,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 05:28:35,681 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-22 05:28:35,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986334406] [2020-08-22 05:28:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986334406] [2020-08-22 05:28:35,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316455261] [2020-08-22 05:28:35,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,722 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-22 05:28:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,740 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-22 05:28:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 05:28:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,743 INFO L225 Difference]: With dead ends: 276 [2020-08-22 05:28:35,743 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 05:28:35,744 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 [2020-08-22 05:28:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 05:28:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-22 05:28:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 05:28:35,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-22 05:28:35,759 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-22 05:28:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,759 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-22 05:28:35,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-22 05:28:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 05:28:35,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,761 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] [2020-08-22 05:28:35,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 05:28:35,762 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-22 05:28:35,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204394451] [2020-08-22 05:28:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204394451] [2020-08-22 05:28:35,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746460412] [2020-08-22 05:28:35,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,806 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-22 05:28:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,844 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-22 05:28:35,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 05:28:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,847 INFO L225 Difference]: With dead ends: 472 [2020-08-22 05:28:35,847 INFO L226 Difference]: Without dead ends: 282 [2020-08-22 05:28:35,849 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 [2020-08-22 05:28:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-22 05:28:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-22 05:28:35,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-22 05:28:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-22 05:28:35,867 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-22 05:28:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,867 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-22 05:28:35,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-22 05:28:35,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:35,869 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,869 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] [2020-08-22 05:28:35,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 05:28:35,870 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-22 05:28:35,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622593427] [2020-08-22 05:28:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:35,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622593427] [2020-08-22 05:28:35,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:35,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:35,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887717183] [2020-08-22 05:28:35,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:35,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:35,930 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-22 05:28:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:35,954 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-22 05:28:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:35,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 05:28:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:35,959 INFO L225 Difference]: With dead ends: 420 [2020-08-22 05:28:35,959 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 05:28:35,961 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 [2020-08-22 05:28:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 05:28:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-22 05:28:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-22 05:28:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-22 05:28:35,974 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-22 05:28:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:35,975 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-22 05:28:35,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-22 05:28:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:35,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:35,977 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] [2020-08-22 05:28:35,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 05:28:35,977 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-22 05:28:35,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:35,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238674216] [2020-08-22 05:28:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238674216] [2020-08-22 05:28:36,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720296923] [2020-08-22 05:28:36,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,011 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-22 05:28:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,034 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-22 05:28:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 05:28:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,038 INFO L225 Difference]: With dead ends: 524 [2020-08-22 05:28:36,039 INFO L226 Difference]: Without dead ends: 522 [2020-08-22 05:28:36,039 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 [2020-08-22 05:28:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-22 05:28:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-22 05:28:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-22 05:28:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-22 05:28:36,054 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-22 05:28:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,055 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-22 05:28:36,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-22 05:28:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 05:28:36,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,057 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] [2020-08-22 05:28:36,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 05:28:36,057 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-22 05:28:36,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039436699] [2020-08-22 05:28:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039436699] [2020-08-22 05:28:36,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323054963] [2020-08-22 05:28:36,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,089 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-22 05:28:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,113 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-22 05:28:36,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 05:28:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,117 INFO L225 Difference]: With dead ends: 924 [2020-08-22 05:28:36,117 INFO L226 Difference]: Without dead ends: 546 [2020-08-22 05:28:36,118 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 [2020-08-22 05:28:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-22 05:28:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-22 05:28:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-22 05:28:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-22 05:28:36,138 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-22 05:28:36,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,138 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-22 05:28:36,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-22 05:28:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:28:36,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,140 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] [2020-08-22 05:28:36,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 05:28:36,141 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-22 05:28:36,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61521943] [2020-08-22 05:28:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61521943] [2020-08-22 05:28:36,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971652069] [2020-08-22 05:28:36,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,169 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-22 05:28:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,190 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-22 05:28:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 05:28:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,194 INFO L225 Difference]: With dead ends: 816 [2020-08-22 05:28:36,194 INFO L226 Difference]: Without dead ends: 554 [2020-08-22 05:28:36,196 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 [2020-08-22 05:28:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-22 05:28:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-22 05:28:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-22 05:28:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-22 05:28:36,214 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-22 05:28:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,214 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-22 05:28:36,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-22 05:28:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:28:36,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,216 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] [2020-08-22 05:28:36,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 05:28:36,216 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-22 05:28:36,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959507271] [2020-08-22 05:28:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959507271] [2020-08-22 05:28:36,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020638539] [2020-08-22 05:28:36,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,246 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-22 05:28:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,270 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-22 05:28:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 05:28:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,277 INFO L225 Difference]: With dead ends: 1004 [2020-08-22 05:28:36,277 INFO L226 Difference]: Without dead ends: 1002 [2020-08-22 05:28:36,278 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 [2020-08-22 05:28:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-22 05:28:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-22 05:28:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 05:28:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-22 05:28:36,309 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-22 05:28:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,310 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-22 05:28:36,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-22 05:28:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 05:28:36,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,312 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] [2020-08-22 05:28:36,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 05:28:36,313 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-22 05:28:36,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269852570] [2020-08-22 05:28:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269852570] [2020-08-22 05:28:36,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777830205] [2020-08-22 05:28:36,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,371 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-22 05:28:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,414 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-22 05:28:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 05:28:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,422 INFO L225 Difference]: With dead ends: 1820 [2020-08-22 05:28:36,423 INFO L226 Difference]: Without dead ends: 1066 [2020-08-22 05:28:36,426 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 [2020-08-22 05:28:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-22 05:28:36,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-22 05:28:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-22 05:28:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-22 05:28:36,467 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-22 05:28:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,468 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-22 05:28:36,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-22 05:28:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 05:28:36,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,470 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] [2020-08-22 05:28:36,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 05:28:36,471 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,471 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-22 05:28:36,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031128518] [2020-08-22 05:28:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031128518] [2020-08-22 05:28:36,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619287574] [2020-08-22 05:28:36,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,518 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-22 05:28:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,546 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-22 05:28:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 05:28:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,551 INFO L225 Difference]: With dead ends: 1596 [2020-08-22 05:28:36,552 INFO L226 Difference]: Without dead ends: 1082 [2020-08-22 05:28:36,555 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 [2020-08-22 05:28:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-22 05:28:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-22 05:28:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-22 05:28:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-22 05:28:36,586 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-22 05:28:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,587 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-22 05:28:36,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-22 05:28:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 05:28:36,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,589 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] [2020-08-22 05:28:36,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 05:28:36,589 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-22 05:28:36,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231628866] [2020-08-22 05:28:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231628866] [2020-08-22 05:28:36,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016937550] [2020-08-22 05:28:36,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,628 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-22 05:28:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,665 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-22 05:28:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,666 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 05:28:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,678 INFO L225 Difference]: With dead ends: 1932 [2020-08-22 05:28:36,678 INFO L226 Difference]: Without dead ends: 1930 [2020-08-22 05:28:36,679 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 [2020-08-22 05:28:36,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-22 05:28:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-22 05:28:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 05:28:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-22 05:28:36,734 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-22 05:28:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,735 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-22 05:28:36,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-22 05:28:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 05:28:36,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,739 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] [2020-08-22 05:28:36,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 05:28:36,739 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-22 05:28:36,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794207693] [2020-08-22 05:28:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794207693] [2020-08-22 05:28:36,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389999314] [2020-08-22 05:28:36,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,764 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-22 05:28:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,810 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-22 05:28:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-22 05:28:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:36,820 INFO L225 Difference]: With dead ends: 3596 [2020-08-22 05:28:36,821 INFO L226 Difference]: Without dead ends: 2090 [2020-08-22 05:28:36,825 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 [2020-08-22 05:28:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-22 05:28:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-22 05:28:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-22 05:28:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-22 05:28:36,888 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-22 05:28:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:36,888 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-22 05:28:36,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-22 05:28:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 05:28:36,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:36,891 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] [2020-08-22 05:28:36,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 05:28:36,892 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-22 05:28:36,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:36,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071932282] [2020-08-22 05:28:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:36,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071932282] [2020-08-22 05:28:36,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:36,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:36,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16155049] [2020-08-22 05:28:36,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:36,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:36,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:36,927 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-22 05:28:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:36,996 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-22 05:28:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:36,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 05:28:36,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:37,012 INFO L225 Difference]: With dead ends: 3132 [2020-08-22 05:28:37,013 INFO L226 Difference]: Without dead ends: 2122 [2020-08-22 05:28:37,016 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 [2020-08-22 05:28:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-22 05:28:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-22 05:28:37,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-22 05:28:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-22 05:28:37,127 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-22 05:28:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:37,127 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-22 05:28:37,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-22 05:28:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 05:28:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:37,132 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] [2020-08-22 05:28:37,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 05:28:37,132 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-22 05:28:37,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:37,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788197995] [2020-08-22 05:28:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:37,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:37,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788197995] [2020-08-22 05:28:37,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:37,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:37,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173307679] [2020-08-22 05:28:37,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:37,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:37,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:37,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:37,174 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-22 05:28:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:37,262 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-22 05:28:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:37,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 05:28:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:37,282 INFO L225 Difference]: With dead ends: 3724 [2020-08-22 05:28:37,283 INFO L226 Difference]: Without dead ends: 3722 [2020-08-22 05:28:37,284 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 [2020-08-22 05:28:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-22 05:28:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-22 05:28:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-22 05:28:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-22 05:28:37,387 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-22 05:28:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:37,388 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-22 05:28:37,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-22 05:28:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 05:28:37,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:37,395 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] [2020-08-22 05:28:37,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 05:28:37,396 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-22 05:28:37,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:37,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848450251] [2020-08-22 05:28:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:37,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:37,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848450251] [2020-08-22 05:28:37,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:37,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:37,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393245656] [2020-08-22 05:28:37,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:37,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:37,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:37,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:37,438 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-22 05:28:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:37,523 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-22 05:28:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:37,524 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-22 05:28:37,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:37,544 INFO L225 Difference]: With dead ends: 7116 [2020-08-22 05:28:37,544 INFO L226 Difference]: Without dead ends: 4106 [2020-08-22 05:28:37,550 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 [2020-08-22 05:28:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-22 05:28:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-22 05:28:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-22 05:28:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-22 05:28:37,704 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-22 05:28:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:37,704 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-22 05:28:37,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-22 05:28:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:28:37,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:37,710 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] [2020-08-22 05:28:37,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 05:28:37,714 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-22 05:28:37,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:37,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81862081] [2020-08-22 05:28:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:37,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:37,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81862081] [2020-08-22 05:28:37,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:37,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:37,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447124614] [2020-08-22 05:28:37,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:37,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:37,742 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-22 05:28:37,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:37,823 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-22 05:28:37,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:37,823 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 05:28:37,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:37,863 INFO L225 Difference]: With dead ends: 6156 [2020-08-22 05:28:37,863 INFO L226 Difference]: Without dead ends: 4170 [2020-08-22 05:28:37,868 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 [2020-08-22 05:28:37,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-22 05:28:37,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-22 05:28:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-22 05:28:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-22 05:28:37,977 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-22 05:28:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:37,978 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-22 05:28:37,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-22 05:28:37,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:28:37,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:37,983 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] [2020-08-22 05:28:37,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 05:28:37,983 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:37,984 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-22 05:28:37,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:37,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449448492] [2020-08-22 05:28:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:38,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:38,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449448492] [2020-08-22 05:28:38,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:38,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:38,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286626070] [2020-08-22 05:28:38,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:38,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:38,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:38,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:38,005 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-22 05:28:38,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:38,111 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-22 05:28:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:38,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 05:28:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:38,128 INFO L225 Difference]: With dead ends: 12108 [2020-08-22 05:28:38,128 INFO L226 Difference]: Without dead ends: 8074 [2020-08-22 05:28:38,138 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 [2020-08-22 05:28:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-22 05:28:38,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-22 05:28:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 05:28:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-22 05:28:38,430 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-22 05:28:38,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:38,431 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-22 05:28:38,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-22 05:28:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 05:28:38,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:38,441 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] [2020-08-22 05:28:38,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 05:28:38,441 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-22 05:28:38,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:38,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447460872] [2020-08-22 05:28:38,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:38,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:38,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447460872] [2020-08-22 05:28:38,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:38,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:38,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963469421] [2020-08-22 05:28:38,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:38,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:38,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:38,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:38,485 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-22 05:28:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:38,614 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-22 05:28:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:38,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-22 05:28:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:38,633 INFO L225 Difference]: With dead ends: 9100 [2020-08-22 05:28:38,633 INFO L226 Difference]: Without dead ends: 9098 [2020-08-22 05:28:38,637 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 [2020-08-22 05:28:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-22 05:28:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-22 05:28:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-22 05:28:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-22 05:28:38,895 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-22 05:28:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:38,896 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-22 05:28:38,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-22 05:28:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 05:28:38,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:38,917 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] [2020-08-22 05:28:38,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 05:28:38,918 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-22 05:28:38,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:38,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967307094] [2020-08-22 05:28:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:39,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:39,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967307094] [2020-08-22 05:28:39,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:39,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:39,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903203020] [2020-08-22 05:28:39,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:39,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:39,068 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-22 05:28:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:39,307 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-22 05:28:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:39,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 05:28:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:39,337 INFO L225 Difference]: With dead ends: 13708 [2020-08-22 05:28:39,337 INFO L226 Difference]: Without dead ends: 13706 [2020-08-22 05:28:39,343 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 [2020-08-22 05:28:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-22 05:28:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-22 05:28:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-22 05:28:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-22 05:28:39,631 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-22 05:28:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:39,631 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-22 05:28:39,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-22 05:28:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 05:28:39,650 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:39,650 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] [2020-08-22 05:28:39,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 05:28:39,650 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-22 05:28:39,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:39,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250296755] [2020-08-22 05:28:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:39,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:39,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250296755] [2020-08-22 05:28:39,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:39,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:39,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317308854] [2020-08-22 05:28:39,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:39,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:39,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:39,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:39,677 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-22 05:28:39,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:39,972 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-22 05:28:39,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:39,973 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-22 05:28:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:40,002 INFO L225 Difference]: With dead ends: 27788 [2020-08-22 05:28:40,003 INFO L226 Difference]: Without dead ends: 15754 [2020-08-22 05:28:40,029 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 [2020-08-22 05:28:40,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-22 05:28:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-22 05:28:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-22 05:28:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-22 05:28:40,947 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-22 05:28:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:40,947 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-22 05:28:40,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-22 05:28:40,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 05:28:40,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:40,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:40,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 05:28:40,966 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-22 05:28:40,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:40,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313577987] [2020-08-22 05:28:40,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:40,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:40,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313577987] [2020-08-22 05:28:40,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:40,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:40,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174015661] [2020-08-22 05:28:40,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:40,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:40,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:40,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:40,987 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-22 05:28:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:41,174 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-22 05:28:41,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:41,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 05:28:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:41,203 INFO L225 Difference]: With dead ends: 23820 [2020-08-22 05:28:41,203 INFO L226 Difference]: Without dead ends: 16138 [2020-08-22 05:28:41,221 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 [2020-08-22 05:28:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-22 05:28:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-22 05:28:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-22 05:28:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-22 05:28:41,546 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-22 05:28:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:41,546 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-22 05:28:41,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-22 05:28:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 05:28:41,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:41,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:41,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 05:28:41,566 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:41,567 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-22 05:28:41,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:41,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535361602] [2020-08-22 05:28:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:41,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:41,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535361602] [2020-08-22 05:28:41,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:41,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:41,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435673386] [2020-08-22 05:28:41,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:41,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:41,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:41,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:41,590 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-22 05:28:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:41,946 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-22 05:28:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:41,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 05:28:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:41,993 INFO L225 Difference]: With dead ends: 26636 [2020-08-22 05:28:41,993 INFO L226 Difference]: Without dead ends: 26634 [2020-08-22 05:28:42,001 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 [2020-08-22 05:28:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-22 05:28:42,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-22 05:28:42,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-22 05:28:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-22 05:28:42,585 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-22 05:28:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:42,585 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-22 05:28:42,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-22 05:28:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 05:28:42,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:42,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:42,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 05:28:42,622 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:42,623 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-22 05:28:42,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:42,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162533620] [2020-08-22 05:28:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:42,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162533620] [2020-08-22 05:28:42,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:42,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:42,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460587146] [2020-08-22 05:28:42,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:42,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:42,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:42,652 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-22 05:28:43,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:43,002 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-22 05:28:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:43,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 05:28:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:43,061 INFO L225 Difference]: With dead ends: 55308 [2020-08-22 05:28:43,061 INFO L226 Difference]: Without dead ends: 31242 [2020-08-22 05:28:43,111 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 [2020-08-22 05:28:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-22 05:28:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-22 05:28:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-22 05:28:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-22 05:28:43,889 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-22 05:28:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:43,889 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-22 05:28:43,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:43,889 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-22 05:28:43,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 05:28:43,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:43,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:43,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 05:28:43,918 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-22 05:28:43,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:43,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24920659] [2020-08-22 05:28:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:43,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24920659] [2020-08-22 05:28:43,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:43,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:43,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478019182] [2020-08-22 05:28:43,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:43,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:43,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:43,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:43,939 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-22 05:28:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:44,283 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-22 05:28:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:44,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 05:28:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:44,342 INFO L225 Difference]: With dead ends: 46860 [2020-08-22 05:28:44,343 INFO L226 Difference]: Without dead ends: 31754 [2020-08-22 05:28:44,375 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 [2020-08-22 05:28:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-22 05:28:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-22 05:28:45,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-22 05:28:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-22 05:28:45,070 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-22 05:28:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:45,070 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-22 05:28:45,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-22 05:28:45,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 05:28:45,091 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:45,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:45,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 05:28:45,091 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-22 05:28:45,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:45,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042831297] [2020-08-22 05:28:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:45,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:45,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042831297] [2020-08-22 05:28:45,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:45,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:45,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379531203] [2020-08-22 05:28:45,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:45,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:45,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:45,111 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-22 05:28:45,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:45,592 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-22 05:28:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:45,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 05:28:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:45,673 INFO L225 Difference]: With dead ends: 51210 [2020-08-22 05:28:45,673 INFO L226 Difference]: Without dead ends: 51208 [2020-08-22 05:28:45,693 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 [2020-08-22 05:28:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-22 05:28:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-22 05:28:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-22 05:28:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-22 05:28:46,574 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-22 05:28:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:46,574 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-22 05:28:46,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-22 05:28:46,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 05:28:46,606 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 05:28:46,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 05:28:46,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 05:28:46,606 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 05:28:46,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 05:28:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-22 05:28:46,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 05:28:46,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535637221] [2020-08-22 05:28:46,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 05:28:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:46,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 05:28:46,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 05:28:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 05:28:46,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535637221] [2020-08-22 05:28:46,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 05:28:46,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 05:28:46,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605680933] [2020-08-22 05:28:46,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 05:28:46,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 05:28:46,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 05:28:46,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 05:28:46,633 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-22 05:28:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 05:28:47,547 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-22 05:28:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 05:28:47,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-22 05:28:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 05:28:47,548 INFO L225 Difference]: With dead ends: 109576 [2020-08-22 05:28:47,548 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 05:28:47,632 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 [2020-08-22 05:28:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 05:28:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 05:28:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 05:28:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 05:28:47,633 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-22 05:28:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 05:28:47,633 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 05:28:47,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 05:28:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 05:28:47,633 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 05:28:47,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 05:28:47,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 05:28:47,667 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 05:28:47,667 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:28:47,667 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 05:28:47,667 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 05:28:47,667 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 05:28:47,667 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 05:28:47,667 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-22 05:28:47,667 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,668 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,669 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,670 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-22 05:28:47,671 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-22 05:28:47,671 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-22 05:28:47,671 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,672 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-22 05:28:47,673 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-22 05:28:47,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 05:28:47 BoogieIcfgContainer [2020-08-22 05:28:47,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 05:28:47,694 INFO L168 Benchmark]: Toolchain (without parser) took 13949.25 ms. Allocated memory was 140.0 MB in the beginning and 1.0 GB in the end (delta: 869.8 MB). Free memory was 102.8 MB in the beginning and 495.4 MB in the end (delta: -392.5 MB). Peak memory consumption was 477.3 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:47,700 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-08-22 05:28:47,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.33 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 91.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:47,702 INFO L168 Benchmark]: Boogie Preprocessor took 134.13 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 180.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:47,703 INFO L168 Benchmark]: RCFGBuilder took 368.68 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 160.0 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:47,704 INFO L168 Benchmark]: TraceAbstraction took 13171.13 ms. Allocated memory was 202.9 MB in the beginning and 1.0 GB in the end (delta: 806.9 MB). Free memory was 160.0 MB in the beginning and 495.4 MB in the end (delta: -335.4 MB). Peak memory consumption was 471.5 MB. Max. memory is 7.1 GB. [2020-08-22 05:28:47,707 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.33 ms. Allocated memory is still 140.0 MB. Free memory was 102.8 MB in the beginning and 91.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.13 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 180.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.68 ms. Allocated memory is still 202.9 MB. Free memory was 180.3 MB in the beginning and 160.0 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13171.13 ms. Allocated memory was 202.9 MB in the beginning and 1.0 GB in the end (delta: 806.9 MB). Free memory was 160.0 MB in the beginning and 495.4 MB in the end (delta: -335.4 MB). Peak memory consumption was 471.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.0s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.9s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...