/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:12:00,067 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 05:12:00,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:12:00,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:12:00,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:12:00,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:12:00,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:12:00,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:12:00,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:12:00,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:12:00,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:12:00,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:12:00,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:12:00,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:12:00,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:12:00,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:12:00,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:12:00,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:12:00,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:12:00,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:12:00,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:12:00,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:12:00,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 05:12:00,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:12:00,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:12:00,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:12:00,179 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 [2020-08-19 05:12:00,229 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:12:00,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:12:00,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:12:00,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:12:00,231 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:12:00,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:12:00,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:12:00,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:12:00,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:12:00,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:12:00,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:12:00,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:12:00,232 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:12:00,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:12:00,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:12:00,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:12:00,233 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:12:00,233 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:12:00,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:12:00,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:12:00,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:12:00,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:12:00,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:12:00,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:12:00,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:12:00,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:12:00,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:12:00,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:12:00,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:12:00,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3; [2020-08-19 05:12:00,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:12:00,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:12:00,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:12:00,563 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:12:00,564 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:12:00,564 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 05:12:00,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee549e583/7b410dc30dbf4d3bab13fe227e36ac0c/FLAG12c1b44b5 [2020-08-19 05:12:01,162 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:12:01,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-19 05:12:01,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee549e583/7b410dc30dbf4d3bab13fe227e36ac0c/FLAG12c1b44b5 [2020-08-19 05:12:01,493 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ee549e583/7b410dc30dbf4d3bab13fe227e36ac0c [2020-08-19 05:12:01,502 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:12:01,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:12:01,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:01,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:12:01,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:12:01,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b79fd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01, skipping insertion in model container [2020-08-19 05:12:01,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:12:01,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:12:01,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:01,771 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:12:01,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:12:01,807 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:12:01,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01 WrapperNode [2020-08-19 05:12:01,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:12:01,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:12:01,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:12:01,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:12:01,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (1/1) ... [2020-08-19 05:12:01,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:12:01,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:12:01,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:12:01,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:12:01,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (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 [2020-08-19 05:12:01,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:12:01,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:12:01,993 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:12:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:12:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:12:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:12:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:12:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:12:02,306 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:12:02,306 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 05:12:02,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:02 BoogieIcfgContainer [2020-08-19 05:12:02,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:12:02,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:12:02,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:12:02,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:12:02,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:12:01" (1/3) ... [2020-08-19 05:12:02,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6197b47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:02, skipping insertion in model container [2020-08-19 05:12:02,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:12:01" (2/3) ... [2020-08-19 05:12:02,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6197b47f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:12:02, skipping insertion in model container [2020-08-19 05:12:02,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:12:02" (3/3) ... [2020-08-19 05:12:02,322 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-19 05:12:02,337 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:12:02,345 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:12:02,380 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:12:02,421 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:12:02,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:12:02,421 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:12:02,421 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:12:02,422 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:12:02,422 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:12:02,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:12:02,422 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:12:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-19 05:12:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:02,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:02,448 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] [2020-08-19 05:12:02,449 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:02,454 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-19 05:12:02,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:02,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750035680] [2020-08-19 05:12:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:02,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:02,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750035680] [2020-08-19 05:12:02,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:02,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:02,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539123125] [2020-08-19 05:12:02,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:02,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:02,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:02,719 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-19 05:12:02,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:02,801 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-19 05:12:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:02,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:02,817 INFO L225 Difference]: With dead ends: 87 [2020-08-19 05:12:02,817 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 05:12:02,822 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 [2020-08-19 05:12:02,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 05:12:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-19 05:12:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 05:12:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-19 05:12:02,872 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-19 05:12:02,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:02,873 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-19 05:12:02,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-19 05:12:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 05:12:02,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:02,875 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] [2020-08-19 05:12:02,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:12:02,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-19 05:12:02,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:02,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138574787] [2020-08-19 05:12:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:02,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:02,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138574787] [2020-08-19 05:12:02,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:02,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:02,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077488129] [2020-08-19 05:12:02,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:02,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:02,946 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-19 05:12:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:02,994 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-19 05:12:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:02,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 05:12:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,000 INFO L225 Difference]: With dead ends: 117 [2020-08-19 05:12:03,000 INFO L226 Difference]: Without dead ends: 72 [2020-08-19 05:12:03,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-19 05:12:03,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-19 05:12:03,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 05:12:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-19 05:12:03,028 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-19 05:12:03,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,029 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-19 05:12:03,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,030 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-19 05:12:03,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:03,031 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,031 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] [2020-08-19 05:12:03,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:12:03,031 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-19 05:12:03,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647456591] [2020-08-19 05:12:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647456591] [2020-08-19 05:12:03,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400532380] [2020-08-19 05:12:03,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,145 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-19 05:12:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,175 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-19 05:12:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,175 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,180 INFO L225 Difference]: With dead ends: 108 [2020-08-19 05:12:03,181 INFO L226 Difference]: Without dead ends: 75 [2020-08-19 05:12:03,182 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 [2020-08-19 05:12:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-19 05:12:03,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-19 05:12:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 05:12:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-19 05:12:03,193 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-19 05:12:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,193 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-19 05:12:03,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-19 05:12:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:03,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,194 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] [2020-08-19 05:12:03,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:12:03,195 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,195 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-19 05:12:03,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948493074] [2020-08-19 05:12:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948493074] [2020-08-19 05:12:03,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146720525] [2020-08-19 05:12:03,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,240 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-19 05:12:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,264 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-19 05:12:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:03,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,267 INFO L225 Difference]: With dead ends: 136 [2020-08-19 05:12:03,267 INFO L226 Difference]: Without dead ends: 134 [2020-08-19 05:12:03,268 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 [2020-08-19 05:12:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-19 05:12:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-19 05:12:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 05:12:03,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-19 05:12:03,280 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-19 05:12:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,281 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-19 05:12:03,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-19 05:12:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 05:12:03,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,282 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] [2020-08-19 05:12:03,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:12:03,283 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-19 05:12:03,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426343602] [2020-08-19 05:12:03,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426343602] [2020-08-19 05:12:03,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478565223] [2020-08-19 05:12:03,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,328 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-19 05:12:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,354 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-19 05:12:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,355 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 05:12:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,357 INFO L225 Difference]: With dead ends: 224 [2020-08-19 05:12:03,357 INFO L226 Difference]: Without dead ends: 136 [2020-08-19 05:12:03,358 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 [2020-08-19 05:12:03,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-19 05:12:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-19 05:12:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-19 05:12:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-19 05:12:03,372 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-19 05:12:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,373 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-19 05:12:03,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-19 05:12:03,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:03,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:03,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:12:03,377 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-19 05:12:03,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635759119] [2020-08-19 05:12:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635759119] [2020-08-19 05:12:03,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328399080] [2020-08-19 05:12:03,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,479 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-19 05:12:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,498 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-19 05:12:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,501 INFO L225 Difference]: With dead ends: 201 [2020-08-19 05:12:03,501 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 05:12:03,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 05:12:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-19 05:12:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 05:12:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-19 05:12:03,533 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-19 05:12:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,533 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-19 05:12:03,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-19 05:12:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:03,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,538 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] [2020-08-19 05:12:03,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:12:03,539 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,539 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-19 05:12:03,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645644912] [2020-08-19 05:12:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645644912] [2020-08-19 05:12:03,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798398167] [2020-08-19 05:12:03,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,573 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-19 05:12:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,592 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-19 05:12:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,595 INFO L225 Difference]: With dead ends: 252 [2020-08-19 05:12:03,595 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 05:12:03,595 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 [2020-08-19 05:12:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 05:12:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-19 05:12:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-19 05:12:03,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-19 05:12:03,617 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-19 05:12:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,618 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-19 05:12:03,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,618 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-19 05:12:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 05:12:03,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,621 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] [2020-08-19 05:12:03,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:12:03,622 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-19 05:12:03,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786298350] [2020-08-19 05:12:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786298350] [2020-08-19 05:12:03,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910172477] [2020-08-19 05:12:03,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,655 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-19 05:12:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,676 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-19 05:12:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 05:12:03,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,679 INFO L225 Difference]: With dead ends: 432 [2020-08-19 05:12:03,679 INFO L226 Difference]: Without dead ends: 258 [2020-08-19 05:12:03,680 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 [2020-08-19 05:12:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-19 05:12:03,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-19 05:12:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-19 05:12:03,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-19 05:12:03,696 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-19 05:12:03,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,697 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-19 05:12:03,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,697 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-19 05:12:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:03,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,699 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] [2020-08-19 05:12:03,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:12:03,699 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-19 05:12:03,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887778646] [2020-08-19 05:12:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887778646] [2020-08-19 05:12:03,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669168938] [2020-08-19 05:12:03,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,740 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-19 05:12:03,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,781 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-19 05:12:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,784 INFO L225 Difference]: With dead ends: 384 [2020-08-19 05:12:03,784 INFO L226 Difference]: Without dead ends: 262 [2020-08-19 05:12:03,785 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 [2020-08-19 05:12:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-19 05:12:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-19 05:12:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-19 05:12:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-19 05:12:03,813 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-19 05:12:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,813 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-19 05:12:03,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-19 05:12:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:03,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,815 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] [2020-08-19 05:12:03,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:12:03,822 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-19 05:12:03,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114626386] [2020-08-19 05:12:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114626386] [2020-08-19 05:12:03,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266161938] [2020-08-19 05:12:03,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,860 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-19 05:12:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,882 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-19 05:12:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,888 INFO L225 Difference]: With dead ends: 476 [2020-08-19 05:12:03,888 INFO L226 Difference]: Without dead ends: 474 [2020-08-19 05:12:03,889 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 [2020-08-19 05:12:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-19 05:12:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-19 05:12:03,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-19 05:12:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-19 05:12:03,904 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-19 05:12:03,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,904 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-19 05:12:03,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-19 05:12:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 05:12:03,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,906 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] [2020-08-19 05:12:03,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:12:03,906 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-19 05:12:03,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360160385] [2020-08-19 05:12:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:03,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:03,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360160385] [2020-08-19 05:12:03,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:03,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:03,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33831873] [2020-08-19 05:12:03,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:03,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:03,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:03,933 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-19 05:12:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:03,960 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-19 05:12:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:03,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 05:12:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:03,963 INFO L225 Difference]: With dead ends: 844 [2020-08-19 05:12:03,964 INFO L226 Difference]: Without dead ends: 498 [2020-08-19 05:12:03,965 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 [2020-08-19 05:12:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-19 05:12:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-19 05:12:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-19 05:12:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-19 05:12:03,984 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-19 05:12:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:03,984 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-19 05:12:03,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-19 05:12:03,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:03,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:03,986 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] [2020-08-19 05:12:03,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:12:03,986 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-19 05:12:03,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:03,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972871823] [2020-08-19 05:12:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972871823] [2020-08-19 05:12:04,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733517754] [2020-08-19 05:12:04,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,029 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-19 05:12:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:04,051 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-19 05:12:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:04,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:04,055 INFO L225 Difference]: With dead ends: 744 [2020-08-19 05:12:04,055 INFO L226 Difference]: Without dead ends: 506 [2020-08-19 05:12:04,056 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 [2020-08-19 05:12:04,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-19 05:12:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-19 05:12:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-19 05:12:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-19 05:12:04,072 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-19 05:12:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:04,073 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-19 05:12:04,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-19 05:12:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:04,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:04,074 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] [2020-08-19 05:12:04,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 05:12:04,075 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-19 05:12:04,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:04,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984943761] [2020-08-19 05:12:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984943761] [2020-08-19 05:12:04,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299414617] [2020-08-19 05:12:04,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,099 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-19 05:12:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:04,122 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-19 05:12:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:04,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:04,128 INFO L225 Difference]: With dead ends: 908 [2020-08-19 05:12:04,128 INFO L226 Difference]: Without dead ends: 906 [2020-08-19 05:12:04,129 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 [2020-08-19 05:12:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-19 05:12:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-19 05:12:04,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-19 05:12:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-19 05:12:04,153 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-19 05:12:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:04,154 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-19 05:12:04,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-19 05:12:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 05:12:04,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:04,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:04,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 05:12:04,157 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:04,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-19 05:12:04,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:04,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502571824] [2020-08-19 05:12:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502571824] [2020-08-19 05:12:04,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299487049] [2020-08-19 05:12:04,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,190 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-19 05:12:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:04,222 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-19 05:12:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:04,223 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 05:12:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:04,229 INFO L225 Difference]: With dead ends: 1660 [2020-08-19 05:12:04,229 INFO L226 Difference]: Without dead ends: 970 [2020-08-19 05:12:04,231 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 [2020-08-19 05:12:04,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-19 05:12:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-19 05:12:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-19 05:12:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-19 05:12:04,267 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-19 05:12:04,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:04,267 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-19 05:12:04,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-19 05:12:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:04,270 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:04,270 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] [2020-08-19 05:12:04,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 05:12:04,270 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-19 05:12:04,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:04,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597375881] [2020-08-19 05:12:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597375881] [2020-08-19 05:12:04,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792241921] [2020-08-19 05:12:04,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,310 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-19 05:12:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:04,340 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-19 05:12:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:04,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:04,346 INFO L225 Difference]: With dead ends: 1452 [2020-08-19 05:12:04,346 INFO L226 Difference]: Without dead ends: 986 [2020-08-19 05:12:04,348 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 [2020-08-19 05:12:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-19 05:12:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-19 05:12:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-19 05:12:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-19 05:12:04,383 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-19 05:12:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:04,384 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-19 05:12:04,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-19 05:12:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:04,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:04,387 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] [2020-08-19 05:12:04,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 05:12:04,387 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-19 05:12:04,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:04,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357912652] [2020-08-19 05:12:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357912652] [2020-08-19 05:12:04,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143733448] [2020-08-19 05:12:04,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,423 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-19 05:12:04,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:04,468 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-19 05:12:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:04,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:04,481 INFO L225 Difference]: With dead ends: 1740 [2020-08-19 05:12:04,482 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 05:12:04,483 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 [2020-08-19 05:12:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 05:12:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-19 05:12:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-19 05:12:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-19 05:12:04,541 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-19 05:12:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:04,542 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-19 05:12:04,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-19 05:12:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:12:04,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:04,545 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] [2020-08-19 05:12:04,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 05:12:04,545 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-19 05:12:04,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:04,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914152326] [2020-08-19 05:12:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914152326] [2020-08-19 05:12:04,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423095213] [2020-08-19 05:12:04,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,572 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-19 05:12:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:04,636 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-19 05:12:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:04,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 05:12:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:04,649 INFO L225 Difference]: With dead ends: 3276 [2020-08-19 05:12:04,650 INFO L226 Difference]: Without dead ends: 1898 [2020-08-19 05:12:04,654 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 [2020-08-19 05:12:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-19 05:12:04,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-19 05:12:04,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-19 05:12:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-19 05:12:04,741 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-19 05:12:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:04,742 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-19 05:12:04,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-19 05:12:04,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:04,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:04,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:04,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 05:12:04,746 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-19 05:12:04,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:04,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84621152] [2020-08-19 05:12:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84621152] [2020-08-19 05:12:04,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597161693] [2020-08-19 05:12:04,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,774 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-19 05:12:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:04,831 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-19 05:12:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:04,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:04,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:04,844 INFO L225 Difference]: With dead ends: 2844 [2020-08-19 05:12:04,844 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 05:12:04,847 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 [2020-08-19 05:12:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 05:12:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-19 05:12:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-19 05:12:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-19 05:12:04,907 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-19 05:12:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:04,907 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-19 05:12:04,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-19 05:12:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:04,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:04,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:04,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 05:12:04,948 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-19 05:12:04,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:04,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868261051] [2020-08-19 05:12:04,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:04,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868261051] [2020-08-19 05:12:04,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:04,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:04,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458281553] [2020-08-19 05:12:04,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:04,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:04,979 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-19 05:12:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:05,038 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-19 05:12:05,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:05,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:05,055 INFO L225 Difference]: With dead ends: 3340 [2020-08-19 05:12:05,056 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 05:12:05,058 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 [2020-08-19 05:12:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 05:12:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-19 05:12:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-19 05:12:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-19 05:12:05,145 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-19 05:12:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:05,146 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-19 05:12:05,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-19 05:12:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 05:12:05,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:05,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:05,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 05:12:05,152 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-19 05:12:05,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:05,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457435467] [2020-08-19 05:12:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:05,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:05,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457435467] [2020-08-19 05:12:05,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:05,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:05,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074507967] [2020-08-19 05:12:05,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:05,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:05,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:05,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:05,178 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-19 05:12:05,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:05,247 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-19 05:12:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:05,248 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 05:12:05,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:05,266 INFO L225 Difference]: With dead ends: 6476 [2020-08-19 05:12:05,266 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 05:12:05,272 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 [2020-08-19 05:12:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 05:12:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-19 05:12:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-19 05:12:05,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-19 05:12:05,375 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-19 05:12:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:05,375 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-19 05:12:05,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:05,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-19 05:12:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:05,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:05,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:05,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 05:12:05,384 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:05,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-19 05:12:05,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:05,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467386193] [2020-08-19 05:12:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:05,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:05,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467386193] [2020-08-19 05:12:05,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:05,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:05,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38471342] [2020-08-19 05:12:05,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:05,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:05,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:05,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:05,461 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-19 05:12:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:05,526 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-19 05:12:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:05,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:05,547 INFO L225 Difference]: With dead ends: 5580 [2020-08-19 05:12:05,547 INFO L226 Difference]: Without dead ends: 3786 [2020-08-19 05:12:05,553 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 [2020-08-19 05:12:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-19 05:12:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-19 05:12:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-19 05:12:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-19 05:12:05,678 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-19 05:12:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:05,678 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-19 05:12:05,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-19 05:12:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:05,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:05,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:05,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 05:12:05,684 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:05,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:05,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-19 05:12:05,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:05,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241527195] [2020-08-19 05:12:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:05,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241527195] [2020-08-19 05:12:05,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:05,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:05,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095821521] [2020-08-19 05:12:05,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:05,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:05,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:05,721 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-19 05:12:05,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:05,834 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-19 05:12:05,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:05,834 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:05,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:05,881 INFO L225 Difference]: With dead ends: 10956 [2020-08-19 05:12:05,881 INFO L226 Difference]: Without dead ends: 7306 [2020-08-19 05:12:05,890 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 [2020-08-19 05:12:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-19 05:12:06,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-19 05:12:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 05:12:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-19 05:12:06,176 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-19 05:12:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:06,176 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-19 05:12:06,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-19 05:12:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 05:12:06,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:06,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:06,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 05:12:06,189 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-19 05:12:06,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:06,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385028304] [2020-08-19 05:12:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:06,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:06,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385028304] [2020-08-19 05:12:06,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:06,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:06,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986990934] [2020-08-19 05:12:06,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:06,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:06,225 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-19 05:12:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:06,349 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-19 05:12:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:06,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 05:12:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:06,368 INFO L225 Difference]: With dead ends: 8076 [2020-08-19 05:12:06,368 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 05:12:06,372 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 [2020-08-19 05:12:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 05:12:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-19 05:12:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-19 05:12:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-19 05:12:06,556 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-19 05:12:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:06,556 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-19 05:12:06,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-19 05:12:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 05:12:06,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:06,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:06,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 05:12:06,566 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-19 05:12:06,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:06,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318986769] [2020-08-19 05:12:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:06,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:06,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318986769] [2020-08-19 05:12:06,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:06,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:06,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854243181] [2020-08-19 05:12:06,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:06,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:06,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:06,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:06,599 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-19 05:12:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:06,807 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-19 05:12:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:06,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 05:12:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:06,827 INFO L225 Difference]: With dead ends: 12172 [2020-08-19 05:12:06,828 INFO L226 Difference]: Without dead ends: 12170 [2020-08-19 05:12:06,830 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 [2020-08-19 05:12:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-19 05:12:07,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-19 05:12:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-19 05:12:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-19 05:12:07,046 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-19 05:12:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:07,046 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-19 05:12:07,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-19 05:12:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 05:12:07,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:07,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:07,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 05:12:07,073 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:07,074 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-19 05:12:07,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:07,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114792114] [2020-08-19 05:12:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:07,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114792114] [2020-08-19 05:12:07,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:07,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:07,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156399393] [2020-08-19 05:12:07,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:07,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:07,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:07,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,126 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-19 05:12:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:07,565 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-19 05:12:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:07,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 05:12:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:07,605 INFO L225 Difference]: With dead ends: 25228 [2020-08-19 05:12:07,605 INFO L226 Difference]: Without dead ends: 14218 [2020-08-19 05:12:07,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-19 05:12:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-19 05:12:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-19 05:12:08,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-19 05:12:08,100 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-19 05:12:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,101 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-19 05:12:08,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-19 05:12:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 05:12:08,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 05:12:08,122 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-19 05:12:08,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258715710] [2020-08-19 05:12:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258715710] [2020-08-19 05:12:08,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080874124] [2020-08-19 05:12:08,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,159 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-19 05:12:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:08,498 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-19 05:12:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:08,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 05:12:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:08,526 INFO L225 Difference]: With dead ends: 21516 [2020-08-19 05:12:08,526 INFO L226 Difference]: Without dead ends: 14602 [2020-08-19 05:12:08,541 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 [2020-08-19 05:12:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-19 05:12:08,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-19 05:12:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-19 05:12:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-19 05:12:08,840 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-19 05:12:08,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:08,840 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-19 05:12:08,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-19 05:12:08,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 05:12:08,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:08,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:08,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 05:12:08,860 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-19 05:12:08,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:08,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753689292] [2020-08-19 05:12:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:08,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753689292] [2020-08-19 05:12:08,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:08,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:08,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139376268] [2020-08-19 05:12:08,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:08,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:08,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:08,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:08,889 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-19 05:12:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:09,589 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-19 05:12:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:09,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 05:12:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:09,643 INFO L225 Difference]: With dead ends: 23562 [2020-08-19 05:12:09,643 INFO L226 Difference]: Without dead ends: 23560 [2020-08-19 05:12:09,650 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 [2020-08-19 05:12:09,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-19 05:12:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-19 05:12:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-19 05:12:10,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-19 05:12:10,099 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-19 05:12:10,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,100 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-19 05:12:10,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-19 05:12:10,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 05:12:10,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:12:10,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:12:10,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 05:12:10,137 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:12:10,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:12:10,138 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-19 05:12:10,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:12:10,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477292173] [2020-08-19 05:12:10,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:12:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:12:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:12:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:12:10,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477292173] [2020-08-19 05:12:10,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:12:10,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 05:12:10,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010060572] [2020-08-19 05:12:10,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 05:12:10,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:12:10,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 05:12:10,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 05:12:10,160 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-19 05:12:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:12:10,586 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-19 05:12:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 05:12:10,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 05:12:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:12:10,587 INFO L225 Difference]: With dead ends: 50184 [2020-08-19 05:12:10,587 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 05:12:10,648 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 [2020-08-19 05:12:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 05:12:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 05:12:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 05:12:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 05:12:10,649 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-19 05:12:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:12:10,649 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 05:12:10,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 05:12:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 05:12:10,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 05:12:10,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 05:12:10,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 05:12:10,680 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 05:12:10,680 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:10,680 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 05:12:10,680 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 05:12:10,680 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 05:12:10,680 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 05:12:10,680 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,681 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-19 05:12:10,684 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,684 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,684 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,684 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-19 05:12:10,684 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-19 05:12:10,684 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-19 05:12:10,685 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-19 05:12:10,685 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-19 05:12:10,685 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-19 05:12:10,685 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-19 05:12:10,685 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,685 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-19 05:12:10,686 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-19 05:12:10,687 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-19 05:12:10,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:12:10 BoogieIcfgContainer [2020-08-19 05:12:10,708 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:12:10,712 INFO L168 Benchmark]: Toolchain (without parser) took 9206.69 ms. Allocated memory was 141.6 MB in the beginning and 659.0 MB in the end (delta: 517.5 MB). Free memory was 105.2 MB in the beginning and 421.1 MB in the end (delta: -315.9 MB). Peak memory consumption was 201.5 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,716 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 05:12:10,716 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.77 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 93.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,722 INFO L168 Benchmark]: Boogie Preprocessor took 117.58 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 93.7 MB in the beginning and 181.1 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,723 INFO L168 Benchmark]: RCFGBuilder took 385.98 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 162.1 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,723 INFO L168 Benchmark]: TraceAbstraction took 8394.33 ms. Allocated memory was 203.4 MB in the beginning and 659.0 MB in the end (delta: 455.6 MB). Free memory was 161.4 MB in the beginning and 421.1 MB in the end (delta: -259.7 MB). Peak memory consumption was 195.9 MB. Max. memory is 7.1 GB. [2020-08-19 05:12:10,728 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.77 ms. Allocated memory is still 141.6 MB. Free memory was 105.0 MB in the beginning and 93.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.58 ms. Allocated memory was 141.6 MB in the beginning and 203.4 MB in the end (delta: 61.9 MB). Free memory was 93.7 MB in the beginning and 181.1 MB in the end (delta: -87.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 385.98 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 162.1 MB in the end (delta: 19.0 MB). Peak memory consumption was 19.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8394.33 ms. Allocated memory was 203.4 MB in the beginning and 659.0 MB in the end (delta: 455.6 MB). Free memory was 161.4 MB in the beginning and 421.1 MB in the end (delta: -259.7 MB). Peak memory consumption was 195.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.2s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...