/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:25:44,316 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-22 01:25:44,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:25:44,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:25:44,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:25:44,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:25:44,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:25:44,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:25:44,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:25:44,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:25:44,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:25:44,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:25:44,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:25:44,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:25:44,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:25:44,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:25:44,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:25:44,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:25:44,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:25:44,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:25:44,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:25:44,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:25:44,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:25:44,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:25:44,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:25:44,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:25:44,433 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 01:25:44,477 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:25:44,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:25:44,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:25:44,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:25:44,479 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:25:44,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:25:44,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:25:44,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:25:44,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:25:44,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:25:44,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:25:44,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:25:44,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:25:44,482 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:25:44,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:25:44,483 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:25:44,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:25:44,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:25:44,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:25:44,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:25:44,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:25:44,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:25:44,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:25:44,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:25:44,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:25:44,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:25:44,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:25:44,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:25:44,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:25:44,486 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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:25:44,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:25:44,809 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:25:44,813 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:25:44,815 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:25:44,815 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:25:44,816 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 01:25:44,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7986a60d0/76fe3c2298b44f2cb7f503583d801161/FLAGd3b2375f5 [2020-08-22 01:25:45,403 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:25:45,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 01:25:45,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7986a60d0/76fe3c2298b44f2cb7f503583d801161/FLAGd3b2375f5 [2020-08-22 01:25:45,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7986a60d0/76fe3c2298b44f2cb7f503583d801161 [2020-08-22 01:25:45,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:25:45,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:25:45,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:45,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:25:45,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:25:45,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:45" (1/1) ... [2020-08-22 01:25:45,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:45, skipping insertion in model container [2020-08-22 01:25:45,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:25:45" (1/1) ... [2020-08-22 01:25:45,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:25:45,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:25:45,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:45,983 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:25:46,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:25:46,024 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:25:46,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46 WrapperNode [2020-08-22 01:25:46,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:25:46,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:25:46,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:25:46,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:25:46,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (1/1) ... [2020-08-22 01:25:46,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (1/1) ... [2020-08-22 01:25:46,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (1/1) ... [2020-08-22 01:25:46,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (1/1) ... [2020-08-22 01:25:46,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (1/1) ... [2020-08-22 01:25:46,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (1/1) ... [2020-08-22 01:25:46,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (1/1) ... [2020-08-22 01:25:46,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:25:46,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:25:46,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:25:46,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:25:46,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (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 01:25:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:25:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:25:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:25:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:25:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:25:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:25:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:25:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:25:46,501 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:25:46,501 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 01:25:46,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:46 BoogieIcfgContainer [2020-08-22 01:25:46,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:25:46,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:25:46,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:25:46,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:25:46,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:25:45" (1/3) ... [2020-08-22 01:25:46,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1b81b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:46, skipping insertion in model container [2020-08-22 01:25:46,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:25:46" (2/3) ... [2020-08-22 01:25:46,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1b81b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:25:46, skipping insertion in model container [2020-08-22 01:25:46,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:25:46" (3/3) ... [2020-08-22 01:25:46,517 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-22 01:25:46,530 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:25:46,540 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:25:46,556 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:25:46,583 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:25:46,584 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:25:46,584 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:25:46,584 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:25:46,584 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:25:46,585 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:25:46,585 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:25:46,585 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:25:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 01:25:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:25:46,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:46,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:46,614 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-22 01:25:46,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:46,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094878462] [2020-08-22 01:25:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:46,828 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 01:25:46,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094878462] [2020-08-22 01:25:46,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:46,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:46,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368093003] [2020-08-22 01:25:46,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:46,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:46,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:46,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:46,877 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-22 01:25:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:46,937 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-22 01:25:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:46,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 01:25:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:46,952 INFO L225 Difference]: With dead ends: 75 [2020-08-22 01:25:46,953 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 01:25:46,963 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 01:25:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 01:25:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-22 01:25:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 01:25:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-22 01:25:47,040 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-22 01:25:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,041 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-22 01:25:47,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,043 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-22 01:25:47,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:25:47,046 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:25:47,048 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-22 01:25:47,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803747713] [2020-08-22 01:25:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,176 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 01:25:47,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803747713] [2020-08-22 01:25:47,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645788269] [2020-08-22 01:25:47,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,186 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-22 01:25:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,218 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-22 01:25:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 01:25:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,221 INFO L225 Difference]: With dead ends: 97 [2020-08-22 01:25:47,221 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 01:25:47,223 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 01:25:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 01:25:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-22 01:25:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 01:25:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-22 01:25:47,233 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-22 01:25:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,234 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-22 01:25:47,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-22 01:25:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:25:47,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:25:47,236 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-22 01:25:47,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658818375] [2020-08-22 01:25:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,285 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 01:25:47,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658818375] [2020-08-22 01:25:47,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803313001] [2020-08-22 01:25:47,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,288 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-22 01:25:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,310 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-22 01:25:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 01:25:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,313 INFO L225 Difference]: With dead ends: 90 [2020-08-22 01:25:47,313 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 01:25:47,314 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 01:25:47,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 01:25:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 01:25:47,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 01:25:47,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-22 01:25:47,325 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-22 01:25:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,325 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-22 01:25:47,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-22 01:25:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:25:47,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:25:47,328 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-22 01:25:47,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976505836] [2020-08-22 01:25:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,409 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 01:25:47,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976505836] [2020-08-22 01:25:47,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382013977] [2020-08-22 01:25:47,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,419 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-22 01:25:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,467 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-22 01:25:47,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 01:25:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,471 INFO L225 Difference]: With dead ends: 112 [2020-08-22 01:25:47,471 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 01:25:47,472 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 01:25:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 01:25:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-22 01:25:47,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 01:25:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-22 01:25:47,499 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-22 01:25:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,500 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-22 01:25:47,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,501 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-22 01:25:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 01:25:47,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:25:47,503 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-22 01:25:47,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401762869] [2020-08-22 01:25:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,567 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 01:25:47,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401762869] [2020-08-22 01:25:47,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493721981] [2020-08-22 01:25:47,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,570 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-22 01:25:47,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,592 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-22 01:25:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 01:25:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,595 INFO L225 Difference]: With dead ends: 184 [2020-08-22 01:25:47,595 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 01:25:47,596 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 01:25:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 01:25:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-22 01:25:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-22 01:25:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-22 01:25:47,608 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-22 01:25:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,608 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-22 01:25:47,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-22 01:25:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:25:47,610 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:25:47,610 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-22 01:25:47,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871484530] [2020-08-22 01:25:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,645 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 01:25:47,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871484530] [2020-08-22 01:25:47,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560031879] [2020-08-22 01:25:47,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,648 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-22 01:25:47,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,670 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-22 01:25:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 01:25:47,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,672 INFO L225 Difference]: With dead ends: 165 [2020-08-22 01:25:47,673 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 01:25:47,674 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 01:25:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 01:25:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-22 01:25:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 01:25:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-22 01:25:47,685 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-22 01:25:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,685 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-22 01:25:47,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-22 01:25:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:25:47,687 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:25:47,688 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,688 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-22 01:25:47,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252133264] [2020-08-22 01:25:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,724 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 01:25:47,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252133264] [2020-08-22 01:25:47,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139393234] [2020-08-22 01:25:47,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,727 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-22 01:25:47,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,748 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-22 01:25:47,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 01:25:47,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,751 INFO L225 Difference]: With dead ends: 204 [2020-08-22 01:25:47,751 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 01:25:47,752 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 01:25:47,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 01:25:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-22 01:25:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 01:25:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-22 01:25:47,767 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-22 01:25:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,767 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-22 01:25:47,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-22 01:25:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:25:47,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:25:47,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:25:47,770 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-22 01:25:47,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597223844] [2020-08-22 01:25:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,799 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 01:25:47,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597223844] [2020-08-22 01:25:47,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398026111] [2020-08-22 01:25:47,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,801 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-22 01:25:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,837 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-22 01:25:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 01:25:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,839 INFO L225 Difference]: With dead ends: 352 [2020-08-22 01:25:47,839 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 01:25:47,841 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 01:25:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 01:25:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-22 01:25:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-22 01:25:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-22 01:25:47,856 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-22 01:25:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,857 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-22 01:25:47,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-22 01:25:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:47,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,859 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 01:25:47,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:25:47,859 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-22 01:25:47,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909134628] [2020-08-22 01:25:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,898 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 01:25:47,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909134628] [2020-08-22 01:25:47,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153821081] [2020-08-22 01:25:47,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,901 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-22 01:25:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:47,918 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 01:25:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:47,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:47,920 INFO L225 Difference]: With dead ends: 312 [2020-08-22 01:25:47,920 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 01:25:47,921 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 01:25:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 01:25:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-22 01:25:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 01:25:47,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-22 01:25:47,935 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-22 01:25:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:47,936 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-22 01:25:47,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-22 01:25:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:47,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:47,938 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 01:25:47,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:25:47,938 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:47,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-22 01:25:47,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:47,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613806817] [2020-08-22 01:25:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:47,973 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 01:25:47,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613806817] [2020-08-22 01:25:47,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:47,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:47,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546440393] [2020-08-22 01:25:47,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:47,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:47,976 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-22 01:25:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,018 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-22 01:25:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,027 INFO L225 Difference]: With dead ends: 380 [2020-08-22 01:25:48,027 INFO L226 Difference]: Without dead ends: 378 [2020-08-22 01:25:48,028 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 01:25:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-22 01:25:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-22 01:25:48,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 01:25:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-22 01:25:48,052 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-22 01:25:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,053 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-22 01:25:48,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-22 01:25:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 01:25:48,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,064 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 01:25:48,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:25:48,065 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,065 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-22 01:25:48,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060807943] [2020-08-22 01:25:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,110 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 01:25:48,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060807943] [2020-08-22 01:25:48,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130191296] [2020-08-22 01:25:48,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,114 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-22 01:25:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,164 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-22 01:25:48,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 01:25:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,168 INFO L225 Difference]: With dead ends: 684 [2020-08-22 01:25:48,168 INFO L226 Difference]: Without dead ends: 402 [2020-08-22 01:25:48,170 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 01:25:48,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-22 01:25:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-22 01:25:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-22 01:25:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-22 01:25:48,190 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-22 01:25:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,191 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-22 01:25:48,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-22 01:25:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:48,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,195 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 01:25:48,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:25:48,196 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-22 01:25:48,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189332472] [2020-08-22 01:25:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,235 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 01:25:48,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189332472] [2020-08-22 01:25:48,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196153827] [2020-08-22 01:25:48,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,239 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-22 01:25:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,261 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-22 01:25:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,264 INFO L225 Difference]: With dead ends: 600 [2020-08-22 01:25:48,264 INFO L226 Difference]: Without dead ends: 410 [2020-08-22 01:25:48,265 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 01:25:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-22 01:25:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-22 01:25:48,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-22 01:25:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-22 01:25:48,279 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-22 01:25:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,279 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-22 01:25:48,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-22 01:25:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:48,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,281 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 01:25:48,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:25:48,281 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-22 01:25:48,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686049517] [2020-08-22 01:25:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,305 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 01:25:48,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686049517] [2020-08-22 01:25:48,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583608103] [2020-08-22 01:25:48,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,307 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-22 01:25:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,329 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-22 01:25:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:48,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,333 INFO L225 Difference]: With dead ends: 716 [2020-08-22 01:25:48,333 INFO L226 Difference]: Without dead ends: 714 [2020-08-22 01:25:48,334 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 01:25:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-22 01:25:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-22 01:25:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 01:25:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-22 01:25:48,353 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-22 01:25:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,353 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-22 01:25:48,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-22 01:25:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:25:48,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,355 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 01:25:48,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:25:48,355 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-22 01:25:48,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932337053] [2020-08-22 01:25:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,375 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 01:25:48,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932337053] [2020-08-22 01:25:48,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309601540] [2020-08-22 01:25:48,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,377 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-22 01:25:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,404 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-22 01:25:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 01:25:48,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,408 INFO L225 Difference]: With dead ends: 1340 [2020-08-22 01:25:48,409 INFO L226 Difference]: Without dead ends: 778 [2020-08-22 01:25:48,410 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 01:25:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-22 01:25:48,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-22 01:25:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 01:25:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-22 01:25:48,434 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-22 01:25:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,434 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-22 01:25:48,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-22 01:25:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:48,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,436 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 01:25:48,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:25:48,436 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-22 01:25:48,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957300545] [2020-08-22 01:25:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,457 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 01:25:48,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957300545] [2020-08-22 01:25:48,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176976090] [2020-08-22 01:25:48,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,459 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-22 01:25:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,483 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-22 01:25:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,487 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 01:25:48,488 INFO L226 Difference]: Without dead ends: 794 [2020-08-22 01:25:48,489 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 01:25:48,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-22 01:25:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-22 01:25:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-22 01:25:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-22 01:25:48,517 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-22 01:25:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,517 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-22 01:25:48,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-22 01:25:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:48,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,519 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 01:25:48,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:25:48,520 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-22 01:25:48,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860353574] [2020-08-22 01:25:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,551 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 01:25:48,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860353574] [2020-08-22 01:25:48,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556284898] [2020-08-22 01:25:48,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,554 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-22 01:25:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,590 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-22 01:25:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:48,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,598 INFO L225 Difference]: With dead ends: 1356 [2020-08-22 01:25:48,599 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 01:25:48,600 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 01:25:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 01:25:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-22 01:25:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-22 01:25:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-22 01:25:48,655 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-22 01:25:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,655 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-22 01:25:48,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-22 01:25:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 01:25:48,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,658 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 01:25:48,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:25:48,659 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-22 01:25:48,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441825073] [2020-08-22 01:25:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,679 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 01:25:48,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441825073] [2020-08-22 01:25:48,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819508534] [2020-08-22 01:25:48,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,681 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-22 01:25:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,728 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-22 01:25:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 01:25:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,740 INFO L225 Difference]: With dead ends: 2636 [2020-08-22 01:25:48,741 INFO L226 Difference]: Without dead ends: 1514 [2020-08-22 01:25:48,744 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 01:25:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-22 01:25:48,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-22 01:25:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-22 01:25:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-22 01:25:48,808 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-22 01:25:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:48,808 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-22 01:25:48,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-22 01:25:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:25:48,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:48,813 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 01:25:48,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:25:48,814 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:48,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-22 01:25:48,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:48,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254602626] [2020-08-22 01:25:48,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:48,845 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 01:25:48,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254602626] [2020-08-22 01:25:48,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:48,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:48,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192282401] [2020-08-22 01:25:48,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:48,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:48,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:48,853 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-22 01:25:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:48,909 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-22 01:25:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:48,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 01:25:48,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:48,920 INFO L225 Difference]: With dead ends: 2268 [2020-08-22 01:25:48,920 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 01:25:48,923 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 01:25:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 01:25:48,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-22 01:25:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 01:25:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-22 01:25:48,999 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-22 01:25:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:49,000 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-22 01:25:49,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-22 01:25:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:25:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:49,005 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 01:25:49,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:25:49,005 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-22 01:25:49,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:49,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848321175] [2020-08-22 01:25:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,040 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 01:25:49,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848321175] [2020-08-22 01:25:49,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:49,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:49,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069426748] [2020-08-22 01:25:49,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:49,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:49,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:49,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:49,046 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-22 01:25:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:49,110 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-22 01:25:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:49,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 01:25:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:49,124 INFO L225 Difference]: With dead ends: 2572 [2020-08-22 01:25:49,125 INFO L226 Difference]: Without dead ends: 2570 [2020-08-22 01:25:49,126 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 01:25:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-22 01:25:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-22 01:25:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-22 01:25:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-22 01:25:49,199 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-22 01:25:49,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:49,199 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-22 01:25:49,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-22 01:25:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 01:25:49,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:49,204 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 01:25:49,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:25:49,204 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:49,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-22 01:25:49,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:49,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339796084] [2020-08-22 01:25:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,226 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 01:25:49,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339796084] [2020-08-22 01:25:49,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:49,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:49,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296728084] [2020-08-22 01:25:49,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:49,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:49,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:49,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:49,229 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-22 01:25:49,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:49,313 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-22 01:25:49,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:49,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 01:25:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:49,326 INFO L225 Difference]: With dead ends: 5196 [2020-08-22 01:25:49,326 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 01:25:49,331 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 01:25:49,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 01:25:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-22 01:25:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-22 01:25:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-22 01:25:49,438 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-22 01:25:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:49,438 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-22 01:25:49,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-22 01:25:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:25:49,445 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:49,445 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 01:25:49,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:25:49,448 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:49,448 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-22 01:25:49,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:49,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833808983] [2020-08-22 01:25:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,474 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 01:25:49,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833808983] [2020-08-22 01:25:49,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:49,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:49,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288983263] [2020-08-22 01:25:49,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:49,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:49,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:49,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:49,477 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-22 01:25:49,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:49,537 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-22 01:25:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:49,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 01:25:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:49,551 INFO L225 Difference]: With dead ends: 4428 [2020-08-22 01:25:49,551 INFO L226 Difference]: Without dead ends: 3018 [2020-08-22 01:25:49,555 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 01:25:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-22 01:25:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-22 01:25:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 01:25:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-22 01:25:49,646 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-22 01:25:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:49,646 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-22 01:25:49,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-22 01:25:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:25:49,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:49,651 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 01:25:49,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:25:49,651 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-22 01:25:49,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:49,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859216108] [2020-08-22 01:25:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,681 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 01:25:49,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859216108] [2020-08-22 01:25:49,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:49,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:49,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409706307] [2020-08-22 01:25:49,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:49,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:49,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:49,684 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-22 01:25:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:49,786 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-22 01:25:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:49,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 01:25:49,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:49,802 INFO L225 Difference]: With dead ends: 8650 [2020-08-22 01:25:49,802 INFO L226 Difference]: Without dead ends: 3016 [2020-08-22 01:25:49,815 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 01:25:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-22 01:25:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-22 01:25:49,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 01:25:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-22 01:25:49,954 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-22 01:25:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:49,954 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-22 01:25:49,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-22 01:25:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 01:25:49,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:25:49,959 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 01:25:49,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:25:49,959 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:25:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:25:49,960 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-22 01:25:49,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:25:49,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914886937] [2020-08-22 01:25:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:25:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:25:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:25:49,980 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 01:25:49,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914886937] [2020-08-22 01:25:49,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:25:49,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:25:49,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706039673] [2020-08-22 01:25:49,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:25:49,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:25:49,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:25:49,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:25:49,982 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-22 01:25:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:25:50,022 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-22 01:25:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:25:50,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 01:25:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:25:50,023 INFO L225 Difference]: With dead ends: 3016 [2020-08-22 01:25:50,023 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 01:25:50,027 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 01:25:50,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 01:25:50,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 01:25:50,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 01:25:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 01:25:50,029 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 01:25:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:25:50,029 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 01:25:50,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:25:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 01:25:50,029 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 01:25:50,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:25:50,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 01:25:50,055 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 01:25:50,055 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:25:50,055 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:25:50,055 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 01:25:50,055 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 01:25:50,055 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 01:25:50,055 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-22 01:25:50,056 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-22 01:25:50,056 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,056 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-22 01:25:50,056 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,056 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-22 01:25:50,056 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,056 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,057 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-22 01:25:50,057 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-22 01:25:50,057 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-22 01:25:50,057 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-22 01:25:50,057 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-22 01:25:50,057 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,057 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,058 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-22 01:25:50,059 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-22 01:25:50,059 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,059 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-22 01:25:50,059 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,059 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,059 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-22 01:25:50,059 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-22 01:25:50,059 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 01:25:50,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:25:50 BoogieIcfgContainer [2020-08-22 01:25:50,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:25:50,076 INFO L168 Benchmark]: Toolchain (without parser) took 4325.87 ms. Allocated memory was 144.2 MB in the beginning and 305.1 MB in the end (delta: 161.0 MB). Free memory was 99.4 MB in the beginning and 223.4 MB in the end (delta: -123.9 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:50,076 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 144.2 MB. Free memory was 117.4 MB in the beginning and 117.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 01:25:50,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.07 ms. Allocated memory is still 144.2 MB. Free memory was 99.2 MB in the beginning and 88.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:50,078 INFO L168 Benchmark]: Boogie Preprocessor took 128.59 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 88.7 MB in the beginning and 178.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:50,078 INFO L168 Benchmark]: RCFGBuilder took 352.43 ms. Allocated memory is still 200.3 MB. Free memory was 178.8 MB in the beginning and 160.5 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:50,079 INFO L168 Benchmark]: TraceAbstraction took 3564.08 ms. Allocated memory was 200.3 MB in the beginning and 305.1 MB in the end (delta: 104.9 MB). Free memory was 159.8 MB in the beginning and 223.4 MB in the end (delta: -63.5 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:25:50,087 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 144.2 MB. Free memory was 117.4 MB in the beginning and 117.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.07 ms. Allocated memory is still 144.2 MB. Free memory was 99.2 MB in the beginning and 88.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.59 ms. Allocated memory was 144.2 MB in the beginning and 200.3 MB in the end (delta: 56.1 MB). Free memory was 88.7 MB in the beginning and 178.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.43 ms. Allocated memory is still 200.3 MB. Free memory was 178.8 MB in the beginning and 160.5 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3564.08 ms. Allocated memory was 200.3 MB in the beginning and 305.1 MB in the end (delta: 104.9 MB). Free memory was 159.8 MB in the beginning and 223.4 MB in the end (delta: -63.5 MB). Peak memory consumption was 41.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...