/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:14:21,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:14:21,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:14:21,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:14:21,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:14:21,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:14:21,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:14:21,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:14:21,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:14:21,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:14:21,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:14:21,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:14:21,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:14:21,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:14:21,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:14:21,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:14:21,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:14:21,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:14:21,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:14:21,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:14:21,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:14:21,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:14:21,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:14:21,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:14:21,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:14:21,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:14:21,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:14:21,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:14:21,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 02:14:21,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:14:21,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:14:21,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:14:21,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:14:21,503 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:14:21,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:14:21,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:14:21,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:14:21,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:14:21,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:14:21,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:14:21,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:14:21,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:14:21,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:14:21,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:14:21,505 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:14:21,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:14:21,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:14:21,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:14:21,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:14:21,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:14:21,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:14:21,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:14:21,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:14:21,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:14:21,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:14:21,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:14:21,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:14:21,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:14:21,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:14:21,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:14:21,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:14:21,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:14:21,831 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:14:21,832 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:14:21,832 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 02:14:21,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11b322e1e/1b55c07e0ef14387b394db367eac38e6/FLAG22970ed3e [2020-08-22 02:14:22,383 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:14:22,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 02:14:22,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11b322e1e/1b55c07e0ef14387b394db367eac38e6/FLAG22970ed3e [2020-08-22 02:14:22,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11b322e1e/1b55c07e0ef14387b394db367eac38e6 [2020-08-22 02:14:22,733 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:14:22,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:14:22,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:22,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:14:22,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:14:22,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:22" (1/1) ... [2020-08-22 02:14:22,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51800d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:22, skipping insertion in model container [2020-08-22 02:14:22,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:14:22" (1/1) ... [2020-08-22 02:14:22,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:14:22,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:14:22,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:23,003 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:14:23,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:14:23,043 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:14:23,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23 WrapperNode [2020-08-22 02:14:23,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:14:23,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:14:23,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:14:23,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:14:23,140 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... [2020-08-22 02:14:23,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... [2020-08-22 02:14:23,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... [2020-08-22 02:14:23,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... [2020-08-22 02:14:23,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... [2020-08-22 02:14:23,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... [2020-08-22 02:14:23,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... [2020-08-22 02:14:23,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:14:23,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:14:23,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:14:23,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:14:23,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:14:23,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:14:23,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:14:23,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:14:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:14:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:14:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:14:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:14:23,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:14:23,581 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:14:23,582 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 02:14:23,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:23 BoogieIcfgContainer [2020-08-22 02:14:23,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:14:23,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:14:23,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:14:23,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:14:23,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:14:22" (1/3) ... [2020-08-22 02:14:23,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314bf060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:23, skipping insertion in model container [2020-08-22 02:14:23,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:14:23" (2/3) ... [2020-08-22 02:14:23,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314bf060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:14:23, skipping insertion in model container [2020-08-22 02:14:23,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:14:23" (3/3) ... [2020-08-22 02:14:23,595 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-22 02:14:23,606 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:14:23,616 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:14:23,633 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:14:23,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:14:23,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:14:23,666 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:14:23,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:14:23,668 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:14:23,668 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:14:23,668 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:14:23,668 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:14:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 02:14:23,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 02:14:23,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:23,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:23,700 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:23,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-22 02:14:23,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:23,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550182902] [2020-08-22 02:14:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:23,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:23,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550182902] [2020-08-22 02:14:23,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:23,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:23,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898872554] [2020-08-22 02:14:23,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:23,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:23,924 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 02:14:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:23,979 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-22 02:14:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:23,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 02:14:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:23,992 INFO L225 Difference]: With dead ends: 69 [2020-08-22 02:14:23,992 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 02:14:23,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 02:14:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-22 02:14:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 02:14:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-22 02:14:24,037 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-22 02:14:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,038 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-22 02:14:24,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-22 02:14:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 02:14:24,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:14:24,040 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-22 02:14:24,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66382922] [2020-08-22 02:14:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66382922] [2020-08-22 02:14:24,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612474962] [2020-08-22 02:14:24,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,109 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-22 02:14:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,143 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-22 02:14:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 02:14:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,146 INFO L225 Difference]: With dead ends: 87 [2020-08-22 02:14:24,146 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 02:14:24,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 02:14:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-22 02:14:24,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 02:14:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-22 02:14:24,158 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-22 02:14:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,159 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-22 02:14:24,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-22 02:14:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:14:24,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:14:24,161 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-22 02:14:24,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049591121] [2020-08-22 02:14:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049591121] [2020-08-22 02:14:24,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752096689] [2020-08-22 02:14:24,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,234 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-22 02:14:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,257 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-22 02:14:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 02:14:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,260 INFO L225 Difference]: With dead ends: 81 [2020-08-22 02:14:24,260 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 02:14:24,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 02:14:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-22 02:14:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 02:14:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-22 02:14:24,271 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-22 02:14:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,272 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-22 02:14:24,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-22 02:14:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:14:24,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:14:24,274 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-22 02:14:24,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919330750] [2020-08-22 02:14:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919330750] [2020-08-22 02:14:24,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917581851] [2020-08-22 02:14:24,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,370 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-22 02:14:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,410 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-22 02:14:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 02:14:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,412 INFO L225 Difference]: With dead ends: 100 [2020-08-22 02:14:24,413 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 02:14:24,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 02:14:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-22 02:14:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 02:14:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-22 02:14:24,425 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-22 02:14:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,425 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-22 02:14:24,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-22 02:14:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 02:14:24,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:14:24,427 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-22 02:14:24,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165323854] [2020-08-22 02:14:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165323854] [2020-08-22 02:14:24,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264766186] [2020-08-22 02:14:24,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,468 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-22 02:14:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,493 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-22 02:14:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 02:14:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,495 INFO L225 Difference]: With dead ends: 164 [2020-08-22 02:14:24,496 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 02:14:24,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 02:14:24,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-22 02:14:24,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 02:14:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-22 02:14:24,516 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-22 02:14:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,516 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-22 02:14:24,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-22 02:14:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 02:14:24,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:14:24,520 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-22 02:14:24,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553535997] [2020-08-22 02:14:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553535997] [2020-08-22 02:14:24,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635762005] [2020-08-22 02:14:24,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,584 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-22 02:14:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,607 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-22 02:14:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,608 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 02:14:24,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,609 INFO L225 Difference]: With dead ends: 147 [2020-08-22 02:14:24,610 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 02:14:24,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 02:14:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-22 02:14:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 02:14:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-22 02:14:24,622 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-22 02:14:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,623 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-22 02:14:24,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-22 02:14:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 02:14:24,624 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:14:24,625 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-22 02:14:24,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211650287] [2020-08-22 02:14:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211650287] [2020-08-22 02:14:24,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287286305] [2020-08-22 02:14:24,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,661 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-22 02:14:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,680 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-22 02:14:24,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 02:14:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,682 INFO L225 Difference]: With dead ends: 180 [2020-08-22 02:14:24,683 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 02:14:24,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 02:14:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-22 02:14:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 02:14:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-22 02:14:24,704 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-22 02:14:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,704 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-22 02:14:24,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-22 02:14:24,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 02:14:24,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:14:24,707 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-22 02:14:24,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484246613] [2020-08-22 02:14:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484246613] [2020-08-22 02:14:24,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610999754] [2020-08-22 02:14:24,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,744 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-22 02:14:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,762 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 02:14:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 02:14:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,764 INFO L225 Difference]: With dead ends: 312 [2020-08-22 02:14:24,764 INFO L226 Difference]: Without dead ends: 186 [2020-08-22 02:14:24,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-22 02:14:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-22 02:14:24,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 02:14:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-22 02:14:24,781 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-22 02:14:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,784 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-22 02:14:24,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-22 02:14:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:14:24,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:14:24,786 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-22 02:14:24,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677155686] [2020-08-22 02:14:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677155686] [2020-08-22 02:14:24,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465946133] [2020-08-22 02:14:24,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,849 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-22 02:14:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,871 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-22 02:14:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 02:14:24,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,873 INFO L225 Difference]: With dead ends: 276 [2020-08-22 02:14:24,873 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 02:14:24,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 02:14:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-22 02:14:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 02:14:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-22 02:14:24,889 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-22 02:14:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,889 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-22 02:14:24,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,890 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-22 02:14:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:14:24,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:14:24,891 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-22 02:14:24,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108406039] [2020-08-22 02:14:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108406039] [2020-08-22 02:14:24,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106601692] [2020-08-22 02:14:24,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,926 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-22 02:14:24,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:24,951 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-22 02:14:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:24,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 02:14:24,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:24,954 INFO L225 Difference]: With dead ends: 332 [2020-08-22 02:14:24,954 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 02:14:24,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 02:14:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-22 02:14:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 02:14:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-22 02:14:24,969 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-22 02:14:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:24,969 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-22 02:14:24,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-22 02:14:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 02:14:24,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:24,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:24,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:14:24,971 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-22 02:14:24,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:24,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092869607] [2020-08-22 02:14:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:24,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092869607] [2020-08-22 02:14:24,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:24,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:24,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127899261] [2020-08-22 02:14:24,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:24,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:24,999 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-22 02:14:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,024 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-22 02:14:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 02:14:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,027 INFO L225 Difference]: With dead ends: 604 [2020-08-22 02:14:25,028 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 02:14:25,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 02:14:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-22 02:14:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-22 02:14:25,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-22 02:14:25,049 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-22 02:14:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,050 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-22 02:14:25,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-22 02:14:25,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:25,052 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:14:25,052 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-22 02:14:25,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584328823] [2020-08-22 02:14:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584328823] [2020-08-22 02:14:25,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651171673] [2020-08-22 02:14:25,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,079 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-22 02:14:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,101 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-22 02:14:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,104 INFO L225 Difference]: With dead ends: 528 [2020-08-22 02:14:25,104 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 02:14:25,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 02:14:25,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-22 02:14:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 02:14:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-22 02:14:25,121 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-22 02:14:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,121 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-22 02:14:25,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-22 02:14:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:25,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:14:25,124 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-22 02:14:25,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832109528] [2020-08-22 02:14:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832109528] [2020-08-22 02:14:25,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073894594] [2020-08-22 02:14:25,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,149 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-22 02:14:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,170 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-22 02:14:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,171 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:25,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,175 INFO L225 Difference]: With dead ends: 620 [2020-08-22 02:14:25,175 INFO L226 Difference]: Without dead ends: 618 [2020-08-22 02:14:25,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-22 02:14:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-22 02:14:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-22 02:14:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-22 02:14:25,197 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-22 02:14:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,199 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-22 02:14:25,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-22 02:14:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:14:25,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:14:25,202 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-22 02:14:25,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134836548] [2020-08-22 02:14:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134836548] [2020-08-22 02:14:25,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087754413] [2020-08-22 02:14:25,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,254 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-22 02:14:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,281 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-22 02:14:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 02:14:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,285 INFO L225 Difference]: With dead ends: 1180 [2020-08-22 02:14:25,285 INFO L226 Difference]: Without dead ends: 682 [2020-08-22 02:14:25,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-22 02:14:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-22 02:14:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-22 02:14:25,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-22 02:14:25,309 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-22 02:14:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,310 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-22 02:14:25,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,310 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-22 02:14:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:25,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:14:25,312 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-22 02:14:25,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244217404] [2020-08-22 02:14:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244217404] [2020-08-22 02:14:25,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26156229] [2020-08-22 02:14:25,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,336 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-22 02:14:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,362 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-22 02:14:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,367 INFO L225 Difference]: With dead ends: 1020 [2020-08-22 02:14:25,367 INFO L226 Difference]: Without dead ends: 698 [2020-08-22 02:14:25,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-22 02:14:25,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-22 02:14:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-22 02:14:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-22 02:14:25,395 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-22 02:14:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,395 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-22 02:14:25,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-22 02:14:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:25,397 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:14:25,398 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-22 02:14:25,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983473877] [2020-08-22 02:14:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983473877] [2020-08-22 02:14:25,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975972499] [2020-08-22 02:14:25,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,424 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-22 02:14:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,457 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-22 02:14:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,464 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 02:14:25,464 INFO L226 Difference]: Without dead ends: 1162 [2020-08-22 02:14:25,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-22 02:14:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-22 02:14:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-22 02:14:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-22 02:14:25,516 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-22 02:14:25,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,516 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-22 02:14:25,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-22 02:14:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:14:25,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:14:25,520 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-22 02:14:25,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843245616] [2020-08-22 02:14:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843245616] [2020-08-22 02:14:25,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400927187] [2020-08-22 02:14:25,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,552 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-22 02:14:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,591 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-22 02:14:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,592 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 02:14:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,598 INFO L225 Difference]: With dead ends: 2316 [2020-08-22 02:14:25,598 INFO L226 Difference]: Without dead ends: 1322 [2020-08-22 02:14:25,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-22 02:14:25,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-22 02:14:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-22 02:14:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-22 02:14:25,644 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-22 02:14:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,645 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-22 02:14:25,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-22 02:14:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:25,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 02:14:25,649 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-22 02:14:25,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371076063] [2020-08-22 02:14:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371076063] [2020-08-22 02:14:25,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515828636] [2020-08-22 02:14:25,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,683 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-22 02:14:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,723 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-22 02:14:25,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,729 INFO L225 Difference]: With dead ends: 1980 [2020-08-22 02:14:25,730 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 02:14:25,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 02:14:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-22 02:14:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-22 02:14:25,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-22 02:14:25,775 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-22 02:14:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,776 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-22 02:14:25,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-22 02:14:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:25,779 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 02:14:25,780 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-22 02:14:25,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270657315] [2020-08-22 02:14:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:25,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270657315] [2020-08-22 02:14:25,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:25,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:25,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205593586] [2020-08-22 02:14:25,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:25,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:25,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:25,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,811 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-22 02:14:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:25,861 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-22 02:14:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:25,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:25,875 INFO L225 Difference]: With dead ends: 2186 [2020-08-22 02:14:25,875 INFO L226 Difference]: Without dead ends: 2184 [2020-08-22 02:14:25,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:25,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-22 02:14:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-22 02:14:25,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-22 02:14:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-22 02:14:25,960 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-22 02:14:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:25,961 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-22 02:14:25,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-22 02:14:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 02:14:25,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:14:25,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:14:25,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 02:14:25,967 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:14:25,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:14:25,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-22 02:14:25,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:14:25,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717818067] [2020-08-22 02:14:25,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:14:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:26,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:14:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:14:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:14:26,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717818067] [2020-08-22 02:14:26,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:14:26,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 02:14:26,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603421814] [2020-08-22 02:14:26,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 02:14:26,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:14:26,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 02:14:26,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:26,013 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-22 02:14:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:14:26,133 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-22 02:14:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 02:14:26,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 02:14:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:14:26,134 INFO L225 Difference]: With dead ends: 4552 [2020-08-22 02:14:26,134 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 02:14:26,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 02:14:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 02:14:26,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 02:14:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 02:14:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 02:14:26,146 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-22 02:14:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:14:26,147 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 02:14:26,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 02:14:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 02:14:26,147 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 02:14:26,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 02:14:26,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 02:14:26,176 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 02:14:26,176 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:14:26,176 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 02:14:26,176 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 02:14:26,176 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 02:14:26,176 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 02:14:26,177 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-22 02:14:26,177 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-22 02:14:26,177 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,177 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-22 02:14:26,177 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-22 02:14:26,177 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-22 02:14:26,177 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-22 02:14:26,177 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,178 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-22 02:14:26,179 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,180 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-22 02:14:26,180 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-22 02:14:26,180 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,180 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 02:14:26,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:14:26 BoogieIcfgContainer [2020-08-22 02:14:26,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:14:26,194 INFO L168 Benchmark]: Toolchain (without parser) took 3458.92 ms. Allocated memory was 140.5 MB in the beginning and 244.3 MB in the end (delta: 103.8 MB). Free memory was 103.4 MB in the beginning and 203.5 MB in the end (delta: -100.1 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:26,195 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 02:14:26,195 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.42 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:26,196 INFO L168 Benchmark]: Boogie Preprocessor took 142.64 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:26,197 INFO L168 Benchmark]: RCFGBuilder took 398.38 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 164.5 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:26,197 INFO L168 Benchmark]: TraceAbstraction took 2604.37 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 163.9 MB in the beginning and 203.5 MB in the end (delta: -39.7 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-08-22 02:14:26,200 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.42 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.64 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.8 MB in the beginning and 181.0 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.38 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 164.5 MB in the end (delta: 16.4 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2604.37 ms. Allocated memory was 203.4 MB in the beginning and 244.3 MB in the end (delta: 40.9 MB). Free memory was 163.9 MB in the beginning and 203.5 MB in the end (delta: -39.7 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: 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: 30]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 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...