/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:58:04,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:58:04,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:58:04,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:58:04,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:58:04,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:58:04,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:58:04,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:58:04,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:58:04,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:58:04,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:58:04,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:58:04,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:58:04,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:58:04,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:58:04,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:58:04,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:58:04,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:58:04,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:58:04,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:58:04,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:58:04,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:58:04,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:58:04,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:58:04,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:58:04,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:58:04,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:58:04,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:58:04,513 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 01:58:04,534 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:58:04,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:58:04,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:58:04,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:58:04,536 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:58:04,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:58:04,537 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:58:04,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:58:04,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:58:04,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:58:04,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:58:04,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:58:04,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:58:04,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:58:04,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:58:04,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:58:04,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:58:04,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:58:04,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:58:04,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:58:04,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:58:04,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:58:04,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:58:04,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:58:04,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:58:04,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:58:04,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:58:04,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:58:04,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:58:04,541 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=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8; [2020-08-19 01:58:04,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:58:04,876 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:58:04,879 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:58:04,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:58:04,881 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:58:04,882 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 01:58:04,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1831b39f/dea9144dfdae42b69828bc415a7e90e3/FLAG4beb0e7d0 [2020-08-19 01:58:05,419 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:58:05,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-19 01:58:05,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1831b39f/dea9144dfdae42b69828bc415a7e90e3/FLAG4beb0e7d0 [2020-08-19 01:58:05,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e1831b39f/dea9144dfdae42b69828bc415a7e90e3 [2020-08-19 01:58:05,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:58:05,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:58:05,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:05,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:58:05,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:58:05,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:05" (1/1) ... [2020-08-19 01:58:05,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f58caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:05, skipping insertion in model container [2020-08-19 01:58:05,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:58:05" (1/1) ... [2020-08-19 01:58:05,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:58:05,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:58:06,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:06,074 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:58:06,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:58:06,121 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:58:06,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06 WrapperNode [2020-08-19 01:58:06,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:58:06,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:58:06,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:58:06,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:58:06,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (1/1) ... [2020-08-19 01:58:06,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (1/1) ... [2020-08-19 01:58:06,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (1/1) ... [2020-08-19 01:58:06,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (1/1) ... [2020-08-19 01:58:06,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (1/1) ... [2020-08-19 01:58:06,299 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (1/1) ... [2020-08-19 01:58:06,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (1/1) ... [2020-08-19 01:58:06,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:58:06,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:58:06,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:58:06,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:58:06,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (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 01:58:06,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:58:06,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:58:06,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:58:06,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:58:06,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:58:06,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:58:06,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:58:06,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:58:06,674 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:58:06,674 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 01:58:06,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:06 BoogieIcfgContainer [2020-08-19 01:58:06,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:58:06,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:58:06,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:58:06,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:58:06,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:58:05" (1/3) ... [2020-08-19 01:58:06,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f717970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:06, skipping insertion in model container [2020-08-19 01:58:06,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:58:06" (2/3) ... [2020-08-19 01:58:06,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f717970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:58:06, skipping insertion in model container [2020-08-19 01:58:06,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:58:06" (3/3) ... [2020-08-19 01:58:06,688 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-19 01:58:06,699 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:58:06,707 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:58:06,723 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:58:06,780 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:58:06,780 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:58:06,780 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:58:06,781 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:58:06,785 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:58:06,785 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:58:06,785 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:58:06,786 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:58:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-19 01:58:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:58:06,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:06,831 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 01:58:06,832 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-19 01:58:06,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:06,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592658770] [2020-08-19 01:58:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,078 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 01:58:07,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592658770] [2020-08-19 01:58:07,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588063876] [2020-08-19 01:58:07,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,106 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-19 01:58:07,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:07,189 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-19 01:58:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:07,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:58:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:07,203 INFO L225 Difference]: With dead ends: 93 [2020-08-19 01:58:07,203 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 01:58:07,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 01:58:07,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-19 01:58:07,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 01:58:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-19 01:58:07,255 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-19 01:58:07,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:07,255 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-19 01:58:07,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-19 01:58:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 01:58:07,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:07,257 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 01:58:07,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:58:07,258 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:07,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-19 01:58:07,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:07,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [522253917] [2020-08-19 01:58:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,339 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 01:58:07,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [522253917] [2020-08-19 01:58:07,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930262835] [2020-08-19 01:58:07,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,344 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-19 01:58:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:07,386 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-19 01:58:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:07,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 01:58:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:07,389 INFO L225 Difference]: With dead ends: 127 [2020-08-19 01:58:07,389 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 01:58:07,391 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 01:58:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 01:58:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 01:58:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 01:58:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-19 01:58:07,403 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-19 01:58:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:07,404 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-19 01:58:07,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-19 01:58:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:58:07,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:07,406 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 01:58:07,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:58:07,406 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:07,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-19 01:58:07,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:07,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290396365] [2020-08-19 01:58:07,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,462 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 01:58:07,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290396365] [2020-08-19 01:58:07,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401885157] [2020-08-19 01:58:07,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,465 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-19 01:58:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:07,502 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-19 01:58:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:07,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:58:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:07,506 INFO L225 Difference]: With dead ends: 117 [2020-08-19 01:58:07,507 INFO L226 Difference]: Without dead ends: 81 [2020-08-19 01:58:07,508 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 01:58:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-19 01:58:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-19 01:58:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 01:58:07,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-19 01:58:07,519 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-19 01:58:07,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:07,520 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-19 01:58:07,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:07,520 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-19 01:58:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:58:07,521 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:07,521 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 01:58:07,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:58:07,522 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:07,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:07,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-19 01:58:07,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:07,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840303328] [2020-08-19 01:58:07,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,570 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 01:58:07,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840303328] [2020-08-19 01:58:07,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926812975] [2020-08-19 01:58:07,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,573 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-19 01:58:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:07,607 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-19 01:58:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:07,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:58:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:07,609 INFO L225 Difference]: With dead ends: 148 [2020-08-19 01:58:07,609 INFO L226 Difference]: Without dead ends: 146 [2020-08-19 01:58:07,610 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 01:58:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-19 01:58:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-19 01:58:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 01:58:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-19 01:58:07,624 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-19 01:58:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:07,625 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-19 01:58:07,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-19 01:58:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 01:58:07,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:07,626 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 01:58:07,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:58:07,627 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:07,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-19 01:58:07,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:07,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593251896] [2020-08-19 01:58:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,673 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 01:58:07,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593251896] [2020-08-19 01:58:07,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839647800] [2020-08-19 01:58:07,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,676 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-19 01:58:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:07,696 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-19 01:58:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:07,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 01:58:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:07,699 INFO L225 Difference]: With dead ends: 244 [2020-08-19 01:58:07,699 INFO L226 Difference]: Without dead ends: 148 [2020-08-19 01:58:07,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-19 01:58:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-19 01:58:07,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-19 01:58:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-19 01:58:07,715 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-19 01:58:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:07,715 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-19 01:58:07,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-19 01:58:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:58:07,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:07,717 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 01:58:07,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:58:07,718 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:07,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:07,718 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-19 01:58:07,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:07,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770706255] [2020-08-19 01:58:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,789 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 01:58:07,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770706255] [2020-08-19 01:58:07,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157374368] [2020-08-19 01:58:07,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,792 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-19 01:58:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:07,828 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-19 01:58:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:07,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:58:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:07,830 INFO L225 Difference]: With dead ends: 219 [2020-08-19 01:58:07,830 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 01:58:07,831 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 01:58:07,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 01:58:07,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-19 01:58:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-19 01:58:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-19 01:58:07,843 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-19 01:58:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:07,844 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-19 01:58:07,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-19 01:58:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:58:07,845 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:07,845 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 01:58:07,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:58:07,846 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:07,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-19 01:58:07,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:07,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143411568] [2020-08-19 01:58:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,878 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 01:58:07,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143411568] [2020-08-19 01:58:07,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260137342] [2020-08-19 01:58:07,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,881 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-19 01:58:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:07,898 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-19 01:58:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:07,899 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:58:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:07,901 INFO L225 Difference]: With dead ends: 276 [2020-08-19 01:58:07,901 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 01:58:07,902 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 01:58:07,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 01:58:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-19 01:58:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 01:58:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-19 01:58:07,916 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-19 01:58:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:07,916 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-19 01:58:07,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-19 01:58:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 01:58:07,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:07,918 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 01:58:07,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:58:07,919 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-19 01:58:07,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:07,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334232005] [2020-08-19 01:58:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:07,969 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 01:58:07,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334232005] [2020-08-19 01:58:07,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:07,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:07,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013974856] [2020-08-19 01:58:07,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:07,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:07,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:07,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:07,974 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-19 01:58:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,014 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-19 01:58:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 01:58:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,017 INFO L225 Difference]: With dead ends: 472 [2020-08-19 01:58:08,017 INFO L226 Difference]: Without dead ends: 282 [2020-08-19 01:58:08,019 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 01:58:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-19 01:58:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-19 01:58:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-19 01:58:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-19 01:58:08,035 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-19 01:58:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,036 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-19 01:58:08,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-19 01:58:08,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:58:08,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,038 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 01:58:08,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:58:08,039 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-19 01:58:08,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718769546] [2020-08-19 01:58:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,072 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 01:58:08,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718769546] [2020-08-19 01:58:08,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736361035] [2020-08-19 01:58:08,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,075 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-19 01:58:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,093 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-19 01:58:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:58:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,096 INFO L225 Difference]: With dead ends: 420 [2020-08-19 01:58:08,096 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 01:58:08,097 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 01:58:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 01:58:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-19 01:58:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-19 01:58:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-19 01:58:08,110 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-19 01:58:08,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,110 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-19 01:58:08,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,110 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-19 01:58:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:58:08,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,112 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 01:58:08,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:58:08,113 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-19 01:58:08,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550742584] [2020-08-19 01:58:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,139 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 01:58:08,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550742584] [2020-08-19 01:58:08,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86373030] [2020-08-19 01:58:08,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,142 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-19 01:58:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,162 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-19 01:58:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:58:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,166 INFO L225 Difference]: With dead ends: 524 [2020-08-19 01:58:08,166 INFO L226 Difference]: Without dead ends: 522 [2020-08-19 01:58:08,167 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 01:58:08,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-19 01:58:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-19 01:58:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 01:58:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-19 01:58:08,182 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-19 01:58:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,182 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-19 01:58:08,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-19 01:58:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:58:08,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,184 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 01:58:08,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:58:08,184 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-19 01:58:08,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942690349] [2020-08-19 01:58:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,234 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 01:58:08,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942690349] [2020-08-19 01:58:08,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48870394] [2020-08-19 01:58:08,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,238 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-19 01:58:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,287 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-19 01:58:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 01:58:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,294 INFO L225 Difference]: With dead ends: 924 [2020-08-19 01:58:08,295 INFO L226 Difference]: Without dead ends: 546 [2020-08-19 01:58:08,297 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 01:58:08,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-19 01:58:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-19 01:58:08,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-19 01:58:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-19 01:58:08,322 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-19 01:58:08,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,323 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-19 01:58:08,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-19 01:58:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:58:08,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:08,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 01:58:08,327 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-19 01:58:08,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454541522] [2020-08-19 01:58:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,363 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 01:58:08,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454541522] [2020-08-19 01:58:08,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624171665] [2020-08-19 01:58:08,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,365 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-19 01:58:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,386 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-19 01:58:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:58:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,390 INFO L225 Difference]: With dead ends: 816 [2020-08-19 01:58:08,390 INFO L226 Difference]: Without dead ends: 554 [2020-08-19 01:58:08,391 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 01:58:08,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-19 01:58:08,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-19 01:58:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-19 01:58:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-19 01:58:08,409 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-19 01:58:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,410 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-19 01:58:08,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-19 01:58:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:58:08,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,412 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 01:58:08,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 01:58:08,412 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-19 01:58:08,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269471456] [2020-08-19 01:58:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,437 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 01:58:08,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269471456] [2020-08-19 01:58:08,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659619200] [2020-08-19 01:58:08,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,439 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-19 01:58:08,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,464 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-19 01:58:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:58:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,471 INFO L225 Difference]: With dead ends: 1004 [2020-08-19 01:58:08,471 INFO L226 Difference]: Without dead ends: 1002 [2020-08-19 01:58:08,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-19 01:58:08,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-19 01:58:08,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-19 01:58:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-19 01:58:08,499 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-19 01:58:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,500 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-19 01:58:08,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-19 01:58:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 01:58:08,502 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:08,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 01:58:08,503 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-19 01:58:08,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990564903] [2020-08-19 01:58:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,530 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 01:58:08,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990564903] [2020-08-19 01:58:08,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712360580] [2020-08-19 01:58:08,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,533 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-19 01:58:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,564 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-19 01:58:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 01:58:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,571 INFO L225 Difference]: With dead ends: 1820 [2020-08-19 01:58:08,571 INFO L226 Difference]: Without dead ends: 1066 [2020-08-19 01:58:08,573 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 01:58:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-19 01:58:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-19 01:58:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-19 01:58:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-19 01:58:08,619 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-19 01:58:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,620 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-19 01:58:08,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-19 01:58:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:58:08,623 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:08,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 01:58:08,623 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-19 01:58:08,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222311455] [2020-08-19 01:58:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,654 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 01:58:08,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222311455] [2020-08-19 01:58:08,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884283239] [2020-08-19 01:58:08,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,658 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-19 01:58:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,687 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-19 01:58:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:58:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,693 INFO L225 Difference]: With dead ends: 1596 [2020-08-19 01:58:08,693 INFO L226 Difference]: Without dead ends: 1082 [2020-08-19 01:58:08,695 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 01:58:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-19 01:58:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-19 01:58:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-19 01:58:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-19 01:58:08,725 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-19 01:58:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,726 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-19 01:58:08,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-19 01:58:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:58:08,728 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,728 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 01:58:08,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 01:58:08,728 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-19 01:58:08,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880783396] [2020-08-19 01:58:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,754 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 01:58:08,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880783396] [2020-08-19 01:58:08,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321971086] [2020-08-19 01:58:08,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,756 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-19 01:58:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,789 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-19 01:58:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:58:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,799 INFO L225 Difference]: With dead ends: 1932 [2020-08-19 01:58:08,800 INFO L226 Difference]: Without dead ends: 1930 [2020-08-19 01:58:08,801 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 01:58:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-19 01:58:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-19 01:58:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-19 01:58:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-19 01:58:08,849 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-19 01:58:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:08,849 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-19 01:58:08,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-19 01:58:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 01:58:08,852 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:08,852 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 01:58:08,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 01:58:08,853 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-19 01:58:08,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:08,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805945604] [2020-08-19 01:58:08,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:08,874 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 01:58:08,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805945604] [2020-08-19 01:58:08,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:08,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:08,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103339849] [2020-08-19 01:58:08,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:08,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:08,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:08,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:08,876 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-19 01:58:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:08,933 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-19 01:58:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:08,934 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 01:58:08,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:08,947 INFO L225 Difference]: With dead ends: 3596 [2020-08-19 01:58:08,948 INFO L226 Difference]: Without dead ends: 2090 [2020-08-19 01:58:08,952 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 01:58:08,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-19 01:58:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-19 01:58:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-19 01:58:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-19 01:58:09,046 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-19 01:58:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:09,047 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-19 01:58:09,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-19 01:58:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:58:09,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:09,050 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 01:58:09,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 01:58:09,051 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:09,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-19 01:58:09,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:09,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758534481] [2020-08-19 01:58:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,088 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 01:58:09,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758534481] [2020-08-19 01:58:09,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:09,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:09,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493946234] [2020-08-19 01:58:09,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:09,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:09,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:09,095 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-19 01:58:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:09,179 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-19 01:58:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:09,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:58:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:09,195 INFO L225 Difference]: With dead ends: 3132 [2020-08-19 01:58:09,195 INFO L226 Difference]: Without dead ends: 2122 [2020-08-19 01:58:09,199 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 01:58:09,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-19 01:58:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-19 01:58:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-19 01:58:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-19 01:58:09,272 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-19 01:58:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:09,273 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-19 01:58:09,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-19 01:58:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:58:09,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:09,276 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 01:58:09,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 01:58:09,277 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-19 01:58:09,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:09,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394347933] [2020-08-19 01:58:09,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,310 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 01:58:09,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394347933] [2020-08-19 01:58:09,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:09,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:09,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084016826] [2020-08-19 01:58:09,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:09,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:09,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:09,312 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-19 01:58:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:09,377 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-19 01:58:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:09,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:58:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:09,397 INFO L225 Difference]: With dead ends: 3724 [2020-08-19 01:58:09,397 INFO L226 Difference]: Without dead ends: 3722 [2020-08-19 01:58:09,399 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 01:58:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-19 01:58:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-19 01:58:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-19 01:58:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-19 01:58:09,490 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-19 01:58:09,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:09,490 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-19 01:58:09,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:09,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-19 01:58:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:58:09,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:09,496 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 01:58:09,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 01:58:09,496 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:09,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-19 01:58:09,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:09,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553877786] [2020-08-19 01:58:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,527 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 01:58:09,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553877786] [2020-08-19 01:58:09,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:09,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:09,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655478252] [2020-08-19 01:58:09,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:09,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:09,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:09,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:09,529 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-19 01:58:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:09,596 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-19 01:58:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:09,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 01:58:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:09,615 INFO L225 Difference]: With dead ends: 7116 [2020-08-19 01:58:09,616 INFO L226 Difference]: Without dead ends: 4106 [2020-08-19 01:58:09,622 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 01:58:09,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-19 01:58:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-19 01:58:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-19 01:58:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-19 01:58:09,764 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-19 01:58:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:09,765 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-19 01:58:09,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-19 01:58:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 01:58:09,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:09,771 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 01:58:09,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 01:58:09,771 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:09,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-19 01:58:09,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:09,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829471379] [2020-08-19 01:58:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:09,792 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 01:58:09,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829471379] [2020-08-19 01:58:09,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:09,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:09,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057488213] [2020-08-19 01:58:09,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:09,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:09,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:09,794 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-19 01:58:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:09,857 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-19 01:58:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:09,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 01:58:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:09,878 INFO L225 Difference]: With dead ends: 6156 [2020-08-19 01:58:09,878 INFO L226 Difference]: Without dead ends: 4170 [2020-08-19 01:58:09,883 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 01:58:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-19 01:58:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-19 01:58:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-19 01:58:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-19 01:58:10,049 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-19 01:58:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:10,050 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-19 01:58:10,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-19 01:58:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 01:58:10,058 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:10,058 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 01:58:10,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 01:58:10,058 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-19 01:58:10,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:10,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075007533] [2020-08-19 01:58:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:10,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:10,103 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 01:58:10,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075007533] [2020-08-19 01:58:10,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:10,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:10,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866569112] [2020-08-19 01:58:10,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:10,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:10,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:10,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:10,108 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-19 01:58:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:10,267 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-19 01:58:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:10,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 01:58:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:10,351 INFO L225 Difference]: With dead ends: 12108 [2020-08-19 01:58:10,352 INFO L226 Difference]: Without dead ends: 8074 [2020-08-19 01:58:10,359 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 01:58:10,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-19 01:58:10,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-19 01:58:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 01:58:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-19 01:58:10,568 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-19 01:58:10,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:10,568 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-19 01:58:10,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:10,568 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-19 01:58:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 01:58:10,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:10,578 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 01:58:10,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 01:58:10,578 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:10,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-19 01:58:10,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:10,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494071117] [2020-08-19 01:58:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:10,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:10,618 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 01:58:10,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494071117] [2020-08-19 01:58:10,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:10,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:10,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449125794] [2020-08-19 01:58:10,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:10,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:10,622 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-19 01:58:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:10,737 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-19 01:58:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:10,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-19 01:58:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:10,756 INFO L225 Difference]: With dead ends: 9100 [2020-08-19 01:58:10,756 INFO L226 Difference]: Without dead ends: 9098 [2020-08-19 01:58:10,760 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 01:58:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-19 01:58:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-19 01:58:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-19 01:58:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-19 01:58:10,996 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-19 01:58:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:10,997 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-19 01:58:10,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-19 01:58:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 01:58:11,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:11,009 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 01:58:11,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 01:58:11,010 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:11,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:11,010 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-19 01:58:11,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:11,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896866072] [2020-08-19 01:58:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,031 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 01:58:11,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896866072] [2020-08-19 01:58:11,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:11,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:11,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088370051] [2020-08-19 01:58:11,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:11,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:11,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:11,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:11,032 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-19 01:58:11,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:11,169 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-19 01:58:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:11,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 01:58:11,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:11,195 INFO L225 Difference]: With dead ends: 13708 [2020-08-19 01:58:11,195 INFO L226 Difference]: Without dead ends: 13706 [2020-08-19 01:58:11,200 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 01:58:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-19 01:58:11,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-19 01:58:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-19 01:58:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-19 01:58:11,540 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-19 01:58:11,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:11,541 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-19 01:58:11,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-19 01:58:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-19 01:58:11,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:11,563 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 01:58:11,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 01:58:11,563 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:11,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:11,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-19 01:58:11,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:11,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552885948] [2020-08-19 01:58:11,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:11,586 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 01:58:11,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552885948] [2020-08-19 01:58:11,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:11,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:11,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276902684] [2020-08-19 01:58:11,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:11,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:11,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:11,588 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-19 01:58:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:11,775 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-19 01:58:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:11,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-19 01:58:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:11,808 INFO L225 Difference]: With dead ends: 27788 [2020-08-19 01:58:11,808 INFO L226 Difference]: Without dead ends: 15754 [2020-08-19 01:58:11,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-19 01:58:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-19 01:58:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-19 01:58:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-19 01:58:12,311 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-19 01:58:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:12,312 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-19 01:58:12,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-19 01:58:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 01:58:12,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:12,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:12,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 01:58:12,332 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:12,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-19 01:58:12,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:12,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526432015] [2020-08-19 01:58:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:12,358 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 01:58:12,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526432015] [2020-08-19 01:58:12,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:12,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:12,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722595934] [2020-08-19 01:58:12,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:12,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:12,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:12,363 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-19 01:58:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:12,660 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-19 01:58:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:12,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 01:58:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:12,707 INFO L225 Difference]: With dead ends: 23820 [2020-08-19 01:58:12,707 INFO L226 Difference]: Without dead ends: 16138 [2020-08-19 01:58:12,725 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 01:58:12,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-19 01:58:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-19 01:58:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-19 01:58:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-19 01:58:13,065 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-19 01:58:13,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:13,066 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-19 01:58:13,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:13,066 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-19 01:58:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 01:58:13,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:13,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:13,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 01:58:13,087 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:13,088 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-19 01:58:13,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:13,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520761307] [2020-08-19 01:58:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:13,113 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 01:58:13,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520761307] [2020-08-19 01:58:13,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:13,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:13,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310400327] [2020-08-19 01:58:13,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:13,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:13,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:13,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:13,115 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-19 01:58:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:13,811 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-19 01:58:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:13,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 01:58:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:13,860 INFO L225 Difference]: With dead ends: 26636 [2020-08-19 01:58:13,860 INFO L226 Difference]: Without dead ends: 26634 [2020-08-19 01:58:13,869 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 01:58:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-19 01:58:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-19 01:58:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-19 01:58:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-19 01:58:14,412 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-19 01:58:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:14,412 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-19 01:58:14,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-19 01:58:14,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 01:58:14,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:14,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:14,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 01:58:14,455 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-19 01:58:14,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:14,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554520798] [2020-08-19 01:58:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:14,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:14,481 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 01:58:14,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554520798] [2020-08-19 01:58:14,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:14,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:14,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363055604] [2020-08-19 01:58:14,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:14,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:14,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:14,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:14,483 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-19 01:58:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:14,830 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-19 01:58:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:14,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-19 01:58:14,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:14,887 INFO L225 Difference]: With dead ends: 55308 [2020-08-19 01:58:14,887 INFO L226 Difference]: Without dead ends: 31242 [2020-08-19 01:58:14,933 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 01:58:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-19 01:58:15,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-19 01:58:15,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-19 01:58:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-19 01:58:15,626 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-19 01:58:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:15,626 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-19 01:58:15,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-19 01:58:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 01:58:15,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:15,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:15,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 01:58:15,660 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:15,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-19 01:58:15,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:15,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278864521] [2020-08-19 01:58:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:15,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:15,689 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 01:58:15,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278864521] [2020-08-19 01:58:15,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:15,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:15,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002725572] [2020-08-19 01:58:15,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:15,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:15,691 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-19 01:58:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:16,167 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-19 01:58:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:16,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 01:58:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:16,207 INFO L225 Difference]: With dead ends: 46860 [2020-08-19 01:58:16,207 INFO L226 Difference]: Without dead ends: 31754 [2020-08-19 01:58:16,236 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 01:58:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-19 01:58:16,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-19 01:58:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-19 01:58:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-19 01:58:16,760 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-19 01:58:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:16,761 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-19 01:58:16,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-19 01:58:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 01:58:16,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:16,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:16,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 01:58:16,781 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-19 01:58:16,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:16,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278328476] [2020-08-19 01:58:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:16,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:16,810 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 01:58:16,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278328476] [2020-08-19 01:58:16,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:16,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:16,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369870680] [2020-08-19 01:58:16,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:16,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:16,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:16,815 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-19 01:58:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:17,448 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-19 01:58:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:17,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 01:58:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:17,503 INFO L225 Difference]: With dead ends: 51210 [2020-08-19 01:58:17,503 INFO L226 Difference]: Without dead ends: 51208 [2020-08-19 01:58:17,513 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 01:58:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-19 01:58:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-19 01:58:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-19 01:58:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-19 01:58:19,020 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-19 01:58:19,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:19,021 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-19 01:58:19,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-19 01:58:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 01:58:19,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:58:19,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:58:19,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 01:58:19,053 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:58:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:58:19,054 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-19 01:58:19,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:58:19,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949220269] [2020-08-19 01:58:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:58:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:19,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:58:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:58:19,073 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 01:58:19,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949220269] [2020-08-19 01:58:19,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:58:19,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 01:58:19,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453814548] [2020-08-19 01:58:19,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 01:58:19,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:58:19,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 01:58:19,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 01:58:19,075 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-19 01:58:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:58:19,746 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-19 01:58:19,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 01:58:19,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-19 01:58:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:58:19,747 INFO L225 Difference]: With dead ends: 109576 [2020-08-19 01:58:19,747 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:58:19,842 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 01:58:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:58:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:58:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:58:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:58:19,843 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-19 01:58:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:58:19,844 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:58:19,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 01:58:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:58:19,844 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:58:19,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 01:58:19,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:58:19,877 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:58:19,877 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:58:19,877 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:58:19,877 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:58:19,878 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:58:19,878 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:58:19,878 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-19 01:58:19,878 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-19 01:58:19,878 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-19 01:58:19,878 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-19 01:58:19,878 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-19 01:58:19,879 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-19 01:58:19,880 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,880 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-19 01:58:19,881 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,882 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-19 01:58:19,882 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,882 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,882 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-19 01:58:19,882 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-19 01:58:19,882 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-19 01:58:19,882 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-19 01:58:19,883 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,883 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,883 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-19 01:58:19,883 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-19 01:58:19,883 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-19 01:58:19,883 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,883 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,883 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,884 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,884 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,884 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,884 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,884 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-19 01:58:19,884 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-19 01:58:19,884 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,885 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-19 01:58:19,885 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-19 01:58:19,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:58:19 BoogieIcfgContainer [2020-08-19 01:58:19,910 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:58:19,913 INFO L168 Benchmark]: Toolchain (without parser) took 14104.33 ms. Allocated memory was 143.1 MB in the beginning and 939.5 MB in the end (delta: 796.4 MB). Free memory was 103.9 MB in the beginning and 290.5 MB in the end (delta: -186.6 MB). Peak memory consumption was 609.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:19,921 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 01:58:19,922 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.78 ms. Allocated memory is still 143.1 MB. Free memory was 103.7 MB in the beginning and 92.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:19,922 INFO L168 Benchmark]: Boogie Preprocessor took 181.22 ms. Allocated memory was 143.1 MB in the beginning and 206.6 MB in the end (delta: 63.4 MB). Free memory was 92.7 MB in the beginning and 183.9 MB in the end (delta: -91.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:19,922 INFO L168 Benchmark]: RCFGBuilder took 375.13 ms. Allocated memory is still 206.6 MB. Free memory was 183.9 MB in the beginning and 163.4 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:19,923 INFO L168 Benchmark]: TraceAbstraction took 13230.22 ms. Allocated memory was 206.6 MB in the beginning and 939.5 MB in the end (delta: 733.0 MB). Free memory was 163.4 MB in the beginning and 290.5 MB in the end (delta: -127.1 MB). Peak memory consumption was 605.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:58:19,927 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 143.1 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.78 ms. Allocated memory is still 143.1 MB. Free memory was 103.7 MB in the beginning and 92.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 181.22 ms. Allocated memory was 143.1 MB in the beginning and 206.6 MB in the end (delta: 63.4 MB). Free memory was 92.7 MB in the beginning and 183.9 MB in the end (delta: -91.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.13 ms. Allocated memory is still 206.6 MB. Free memory was 183.9 MB in the beginning and 163.4 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13230.22 ms. Allocated memory was 206.6 MB in the beginning and 939.5 MB in the end (delta: 733.0 MB). Free memory was 163.4 MB in the beginning and 290.5 MB in the end (delta: -127.1 MB). Peak memory consumption was 605.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.0s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.6s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...