/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:46:36,149 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 02:46:36,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:46:36,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:46:36,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:46:36,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:46:36,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:46:36,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:46:36,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:46:36,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:46:36,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:46:36,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:46:36,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:46:36,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:46:36,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:46:36,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:46:36,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:46:36,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:46:36,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:46:36,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:46:36,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:46:36,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:46:36,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:46:36,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:46:36,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:46:36,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:46:36,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:46:36,294 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:46:36,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:46:36,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:46:36,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:46:36,296 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:46:36,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:46:36,296 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:46:36,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:46:36,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:46:36,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:46:36,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:46:36,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:46:36,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:46:36,297 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:46:36,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:46:36,298 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:46:36,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:46:36,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:46:36,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:46:36,298 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:46:36,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:46:36,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:46:36,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:46:36,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:46:36,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:46:36,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:46:36,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:46:36,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:46:36,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:46:36,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:46:36,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:46:36,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:46:36,616 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:46:36,618 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:46:36,618 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:46:36,619 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_5.c [2020-08-19 02:46:36,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2dc19fee/a6e56f9b9bdb443cb73db84b2251489b/FLAG0dca9049a [2020-08-19 02:46:37,136 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:46:37,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_5.c [2020-08-19 02:46:37,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2dc19fee/a6e56f9b9bdb443cb73db84b2251489b/FLAG0dca9049a [2020-08-19 02:46:37,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e2dc19fee/a6e56f9b9bdb443cb73db84b2251489b [2020-08-19 02:46:37,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:46:37,540 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:46:37,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:37,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:46:37,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:46:37,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df746a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37, skipping insertion in model container [2020-08-19 02:46:37,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:46:37,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:46:37,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:37,756 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:46:37,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:46:37,792 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:46:37,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37 WrapperNode [2020-08-19 02:46:37,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:46:37,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:46:37,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:46:37,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:46:37,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... [2020-08-19 02:46:37,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:46:37,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:46:37,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:46:37,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:46:37,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:46:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:46:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:46:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:46:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:46:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:46:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:46:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:46:37,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:46:38,215 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:46:38,215 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 02:46:38,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:38 BoogieIcfgContainer [2020-08-19 02:46:38,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:46:38,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:46:38,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:46:38,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:46:38,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:46:37" (1/3) ... [2020-08-19 02:46:38,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2230839c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:38, skipping insertion in model container [2020-08-19 02:46:38,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:46:37" (2/3) ... [2020-08-19 02:46:38,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2230839c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:46:38, skipping insertion in model container [2020-08-19 02:46:38,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:46:38" (3/3) ... [2020-08-19 02:46:38,228 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_5.c [2020-08-19 02:46:38,242 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:46:38,263 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:46:38,287 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:46:38,345 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:46:38,345 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:46:38,345 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:46:38,346 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:46:38,346 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:46:38,346 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:46:38,346 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:46:38,346 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:46:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-19 02:46:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 02:46:38,385 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:38,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:38,387 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 316328318, now seen corresponding path program 1 times [2020-08-19 02:46:38,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:38,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32816694] [2020-08-19 02:46:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:38,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32816694] [2020-08-19 02:46:38,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:38,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:38,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326001811] [2020-08-19 02:46:38,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:38,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,585 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-08-19 02:46:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:38,646 INFO L93 Difference]: Finished difference Result 57 states and 90 transitions. [2020-08-19 02:46:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:38,648 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-19 02:46:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:38,660 INFO L225 Difference]: With dead ends: 57 [2020-08-19 02:46:38,661 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 02:46:38,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 02:46:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30. [2020-08-19 02:46:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 02:46:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2020-08-19 02:46:38,702 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 15 [2020-08-19 02:46:38,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:38,703 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2020-08-19 02:46:38,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:38,703 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2020-08-19 02:46:38,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 02:46:38,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:38,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:38,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:46:38,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash -493018308, now seen corresponding path program 1 times [2020-08-19 02:46:38,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:38,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041139028] [2020-08-19 02:46:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:38,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041139028] [2020-08-19 02:46:38,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:38,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:38,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281071012] [2020-08-19 02:46:38,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:38,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:38,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,768 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 3 states. [2020-08-19 02:46:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:38,797 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2020-08-19 02:46:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:38,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-19 02:46:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:38,803 INFO L225 Difference]: With dead ends: 67 [2020-08-19 02:46:38,803 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 02:46:38,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 02:46:38,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-08-19 02:46:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 02:46:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 65 transitions. [2020-08-19 02:46:38,814 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 65 transitions. Word has length 15 [2020-08-19 02:46:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:38,815 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 65 transitions. [2020-08-19 02:46:38,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:38,815 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 65 transitions. [2020-08-19 02:46:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 02:46:38,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:38,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:38,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:46:38,817 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1216458266, now seen corresponding path program 1 times [2020-08-19 02:46:38,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:38,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483774701] [2020-08-19 02:46:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:38,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483774701] [2020-08-19 02:46:38,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:38,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:38,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397040725] [2020-08-19 02:46:38,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:38,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:38,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:38,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,864 INFO L87 Difference]: Start difference. First operand 40 states and 65 transitions. Second operand 3 states. [2020-08-19 02:46:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:38,885 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-08-19 02:46:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:38,886 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 02:46:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:38,887 INFO L225 Difference]: With dead ends: 63 [2020-08-19 02:46:38,888 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 02:46:38,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 02:46:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-08-19 02:46:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 02:46:38,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 67 transitions. [2020-08-19 02:46:38,897 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 67 transitions. Word has length 16 [2020-08-19 02:46:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:38,897 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 67 transitions. [2020-08-19 02:46:38,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 67 transitions. [2020-08-19 02:46:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 02:46:38,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:38,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:38,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:46:38,899 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:38,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1896516636, now seen corresponding path program 1 times [2020-08-19 02:46:38,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:38,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642869381] [2020-08-19 02:46:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:38,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642869381] [2020-08-19 02:46:38,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:38,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:38,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694365795] [2020-08-19 02:46:38,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:38,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:38,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,958 INFO L87 Difference]: Start difference. First operand 43 states and 67 transitions. Second operand 3 states. [2020-08-19 02:46:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:38,978 INFO L93 Difference]: Finished difference Result 76 states and 120 transitions. [2020-08-19 02:46:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:38,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 02:46:38,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:38,980 INFO L225 Difference]: With dead ends: 76 [2020-08-19 02:46:38,980 INFO L226 Difference]: Without dead ends: 74 [2020-08-19 02:46:38,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-19 02:46:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-08-19 02:46:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 02:46:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2020-08-19 02:46:38,992 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 16 [2020-08-19 02:46:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:38,993 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2020-08-19 02:46:38,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2020-08-19 02:46:38,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 02:46:38,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:38,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:38,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:46:38,995 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:38,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1087170010, now seen corresponding path program 1 times [2020-08-19 02:46:38,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:38,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543210141] [2020-08-19 02:46:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543210141] [2020-08-19 02:46:39,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809296489] [2020-08-19 02:46:39,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,034 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand 3 states. [2020-08-19 02:46:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,056 INFO L93 Difference]: Finished difference Result 124 states and 198 transitions. [2020-08-19 02:46:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-19 02:46:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,058 INFO L225 Difference]: With dead ends: 124 [2020-08-19 02:46:39,058 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 02:46:39,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 02:46:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-08-19 02:46:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 02:46:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 114 transitions. [2020-08-19 02:46:39,073 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 114 transitions. Word has length 16 [2020-08-19 02:46:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,073 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 114 transitions. [2020-08-19 02:46:39,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 114 transitions. [2020-08-19 02:46:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 02:46:39,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:46:39,078 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1337311087, now seen corresponding path program 1 times [2020-08-19 02:46:39,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262231886] [2020-08-19 02:46:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262231886] [2020-08-19 02:46:39,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454706228] [2020-08-19 02:46:39,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,124 INFO L87 Difference]: Start difference. First operand 74 states and 114 transitions. Second operand 3 states. [2020-08-19 02:46:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,143 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2020-08-19 02:46:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,143 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 02:46:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,145 INFO L225 Difference]: With dead ends: 111 [2020-08-19 02:46:39,145 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 02:46:39,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 02:46:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-19 02:46:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 02:46:39,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 114 transitions. [2020-08-19 02:46:39,158 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 114 transitions. Word has length 17 [2020-08-19 02:46:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,158 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 114 transitions. [2020-08-19 02:46:39,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 114 transitions. [2020-08-19 02:46:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 02:46:39,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:46:39,160 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,161 INFO L82 PathProgramCache]: Analyzing trace with hash -657252717, now seen corresponding path program 1 times [2020-08-19 02:46:39,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071604808] [2020-08-19 02:46:39,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071604808] [2020-08-19 02:46:39,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451254579] [2020-08-19 02:46:39,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,205 INFO L87 Difference]: Start difference. First operand 76 states and 114 transitions. Second operand 3 states. [2020-08-19 02:46:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,230 INFO L93 Difference]: Finished difference Result 132 states and 200 transitions. [2020-08-19 02:46:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 02:46:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,232 INFO L225 Difference]: With dead ends: 132 [2020-08-19 02:46:39,233 INFO L226 Difference]: Without dead ends: 130 [2020-08-19 02:46:39,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-08-19 02:46:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2020-08-19 02:46:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-19 02:46:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 154 transitions. [2020-08-19 02:46:39,247 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 154 transitions. Word has length 17 [2020-08-19 02:46:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,248 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 154 transitions. [2020-08-19 02:46:39,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,248 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 154 transitions. [2020-08-19 02:46:39,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-19 02:46:39,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:46:39,250 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1466599343, now seen corresponding path program 1 times [2020-08-19 02:46:39,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93024196] [2020-08-19 02:46:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93024196] [2020-08-19 02:46:39,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933680015] [2020-08-19 02:46:39,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,295 INFO L87 Difference]: Start difference. First operand 104 states and 154 transitions. Second operand 3 states. [2020-08-19 02:46:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,332 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2020-08-19 02:46:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-19 02:46:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,334 INFO L225 Difference]: With dead ends: 232 [2020-08-19 02:46:39,334 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 02:46:39,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 02:46:39,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-19 02:46:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-19 02:46:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2020-08-19 02:46:39,373 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 17 [2020-08-19 02:46:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,377 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2020-08-19 02:46:39,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2020-08-19 02:46:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 02:46:39,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:46:39,380 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1100217935, now seen corresponding path program 1 times [2020-08-19 02:46:39,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589895305] [2020-08-19 02:46:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589895305] [2020-08-19 02:46:39,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769415675] [2020-08-19 02:46:39,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,436 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand 3 states. [2020-08-19 02:46:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,455 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2020-08-19 02:46:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 02:46:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,458 INFO L225 Difference]: With dead ends: 204 [2020-08-19 02:46:39,458 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 02:46:39,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 02:46:39,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-08-19 02:46:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 02:46:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 194 transitions. [2020-08-19 02:46:39,471 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 194 transitions. Word has length 18 [2020-08-19 02:46:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,471 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 194 transitions. [2020-08-19 02:46:39,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 194 transitions. [2020-08-19 02:46:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 02:46:39,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:46:39,473 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1780276305, now seen corresponding path program 1 times [2020-08-19 02:46:39,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556606212] [2020-08-19 02:46:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556606212] [2020-08-19 02:46:39,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752928857] [2020-08-19 02:46:39,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,504 INFO L87 Difference]: Start difference. First operand 140 states and 194 transitions. Second operand 3 states. [2020-08-19 02:46:39,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,525 INFO L93 Difference]: Finished difference Result 236 states and 328 transitions. [2020-08-19 02:46:39,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 02:46:39,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,527 INFO L225 Difference]: With dead ends: 236 [2020-08-19 02:46:39,527 INFO L226 Difference]: Without dead ends: 234 [2020-08-19 02:46:39,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-19 02:46:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2020-08-19 02:46:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-19 02:46:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 270 transitions. [2020-08-19 02:46:39,541 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 270 transitions. Word has length 18 [2020-08-19 02:46:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,544 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 270 transitions. [2020-08-19 02:46:39,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 270 transitions. [2020-08-19 02:46:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 02:46:39,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:46:39,546 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,547 INFO L82 PathProgramCache]: Analyzing trace with hash 970929679, now seen corresponding path program 1 times [2020-08-19 02:46:39,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656879214] [2020-08-19 02:46:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656879214] [2020-08-19 02:46:39,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690015553] [2020-08-19 02:46:39,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,588 INFO L87 Difference]: Start difference. First operand 200 states and 270 transitions. Second operand 3 states. [2020-08-19 02:46:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,616 INFO L93 Difference]: Finished difference Result 444 states and 592 transitions. [2020-08-19 02:46:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-19 02:46:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,619 INFO L225 Difference]: With dead ends: 444 [2020-08-19 02:46:39,619 INFO L226 Difference]: Without dead ends: 258 [2020-08-19 02:46:39,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-19 02:46:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-19 02:46:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-19 02:46:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 326 transitions. [2020-08-19 02:46:39,634 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 326 transitions. Word has length 18 [2020-08-19 02:46:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,634 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 326 transitions. [2020-08-19 02:46:39,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 326 transitions. [2020-08-19 02:46:39,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:46:39,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:46:39,636 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash -645793370, now seen corresponding path program 1 times [2020-08-19 02:46:39,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018436553] [2020-08-19 02:46:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018436553] [2020-08-19 02:46:39,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418019424] [2020-08-19 02:46:39,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,664 INFO L87 Difference]: Start difference. First operand 256 states and 326 transitions. Second operand 3 states. [2020-08-19 02:46:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,686 INFO L93 Difference]: Finished difference Result 384 states and 484 transitions. [2020-08-19 02:46:39,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 02:46:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,688 INFO L225 Difference]: With dead ends: 384 [2020-08-19 02:46:39,688 INFO L226 Difference]: Without dead ends: 266 [2020-08-19 02:46:39,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-08-19 02:46:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2020-08-19 02:46:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-19 02:46:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 326 transitions. [2020-08-19 02:46:39,703 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 326 transitions. Word has length 19 [2020-08-19 02:46:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,704 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 326 transitions. [2020-08-19 02:46:39,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 326 transitions. [2020-08-19 02:46:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:46:39,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:46:39,705 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,706 INFO L82 PathProgramCache]: Analyzing trace with hash 34265000, now seen corresponding path program 1 times [2020-08-19 02:46:39,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626923216] [2020-08-19 02:46:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626923216] [2020-08-19 02:46:39,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722880716] [2020-08-19 02:46:39,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,730 INFO L87 Difference]: Start difference. First operand 264 states and 326 transitions. Second operand 3 states. [2020-08-19 02:46:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,750 INFO L93 Difference]: Finished difference Result 426 states and 519 transitions. [2020-08-19 02:46:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 02:46:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,753 INFO L225 Difference]: With dead ends: 426 [2020-08-19 02:46:39,753 INFO L226 Difference]: Without dead ends: 424 [2020-08-19 02:46:39,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-08-19 02:46:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 392. [2020-08-19 02:46:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-19 02:46:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 470 transitions. [2020-08-19 02:46:39,768 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 470 transitions. Word has length 19 [2020-08-19 02:46:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,768 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 470 transitions. [2020-08-19 02:46:39,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,768 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 470 transitions. [2020-08-19 02:46:39,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 02:46:39,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:46:39,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:46:39,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:46:39,770 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:46:39,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:46:39,770 INFO L82 PathProgramCache]: Analyzing trace with hash -775081626, now seen corresponding path program 1 times [2020-08-19 02:46:39,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:46:39,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650272369] [2020-08-19 02:46:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:46:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:46:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:46:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:46:39,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650272369] [2020-08-19 02:46:39,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:46:39,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:46:39,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661866199] [2020-08-19 02:46:39,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:46:39,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:46:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:46:39,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,795 INFO L87 Difference]: Start difference. First operand 392 states and 470 transitions. Second operand 3 states. [2020-08-19 02:46:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:46:39,821 INFO L93 Difference]: Finished difference Result 856 states and 998 transitions. [2020-08-19 02:46:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:46:39,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 02:46:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:46:39,822 INFO L225 Difference]: With dead ends: 856 [2020-08-19 02:46:39,822 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:46:39,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:46:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:46:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:46:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:46:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:46:39,825 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-08-19 02:46:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:46:39,825 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:46:39,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:46:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:46:39,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:46:39,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:46:39,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:46:39,848 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 02:46:39,848 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:39,848 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:46:39,848 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:46:39,848 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:46:39,848 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:46:39,849 INFO L268 CegarLoopResult]: For program point L64(line 64) no Hoare annotation was computed. [2020-08-19 02:46:39,849 INFO L271 CegarLoopResult]: At program point L89(lines 5 93) the Hoare annotation is: true [2020-08-19 02:46:39,849 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 93) no Hoare annotation was computed. [2020-08-19 02:46:39,849 INFO L268 CegarLoopResult]: For program point L73-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,849 INFO L268 CegarLoopResult]: For program point L69(line 69) no Hoare annotation was computed. [2020-08-19 02:46:39,849 INFO L268 CegarLoopResult]: For program point L57-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,849 INFO L268 CegarLoopResult]: For program point L53-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,849 INFO L268 CegarLoopResult]: For program point L49-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,850 INFO L268 CegarLoopResult]: For program point L78-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,850 INFO L268 CegarLoopResult]: For program point L45-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,850 INFO L268 CegarLoopResult]: For program point L74(line 74) no Hoare annotation was computed. [2020-08-19 02:46:39,850 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-19 02:46:39,850 INFO L268 CegarLoopResult]: For program point L41-2(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,850 INFO L271 CegarLoopResult]: At program point L83-1(lines 24 88) the Hoare annotation is: true [2020-08-19 02:46:39,850 INFO L268 CegarLoopResult]: For program point L79(line 79) no Hoare annotation was computed. [2020-08-19 02:46:39,851 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 93) no Hoare annotation was computed. [2020-08-19 02:46:39,851 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2020-08-19 02:46:39,851 INFO L268 CegarLoopResult]: For program point L63-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,851 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 93) the Hoare annotation is: true [2020-08-19 02:46:39,851 INFO L268 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-08-19 02:46:39,851 INFO L268 CegarLoopResult]: For program point L84(line 84) no Hoare annotation was computed. [2020-08-19 02:46:39,851 INFO L264 CegarLoopResult]: At program point L84-1(lines 5 93) the Hoare annotation is: false [2020-08-19 02:46:39,851 INFO L268 CegarLoopResult]: For program point L68-1(lines 24 88) no Hoare annotation was computed. [2020-08-19 02:46:39,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:46:39 BoogieIcfgContainer [2020-08-19 02:46:39,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:46:39,865 INFO L168 Benchmark]: Toolchain (without parser) took 2323.78 ms. Allocated memory was 138.9 MB in the beginning and 232.8 MB in the end (delta: 93.8 MB). Free memory was 101.7 MB in the beginning and 142.6 MB in the end (delta: -40.9 MB). Peak memory consumption was 53.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:39,865 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:46:39,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.18 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:39,867 INFO L168 Benchmark]: Boogie Preprocessor took 125.45 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 178.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:39,868 INFO L168 Benchmark]: RCFGBuilder took 299.72 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 164.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:39,869 INFO L168 Benchmark]: TraceAbstraction took 1641.38 ms. Allocated memory was 200.8 MB in the beginning and 232.8 MB in the end (delta: 32.0 MB). Free memory was 163.5 MB in the beginning and 142.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:46:39,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.18 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 91.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.45 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 178.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.72 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 164.2 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1641.38 ms. Allocated memory was 200.8 MB in the beginning and 232.8 MB in the end (delta: 32.0 MB). Free memory was 163.5 MB in the beginning and 142.6 MB in the end (delta: 20.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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: 24]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.4s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 654 SDtfs, 285 SDslu, 428 SDs, 0 SdLazy, 75 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=392occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 138 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 42 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 6424 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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...