/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=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:18:39,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:18:39,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:18:39,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:18:39,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:18:39,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:18:39,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:18:39,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:18:39,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:18:39,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:18:39,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:18:39,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:18:39,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:18:39,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:18:39,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:18:39,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:18:39,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:18:39,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:18:39,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:18:39,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:18:39,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:18:39,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:18:39,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:18:39,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:18:39,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 20:18:39,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:18:39,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:18:39,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:18:39,424 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 [2020-08-18 20:18:39,446 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:18:39,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:18:39,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:18:39,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:18:39,448 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:18:39,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:18:39,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:18:39,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:18:39,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:18:39,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:18:39,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:18:39,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:18:39,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:18:39,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:18:39,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:18:39,450 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:18:39,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:18:39,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:18:39,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:18:39,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:18:39,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:18:39,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:18:39,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:18:39,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:18:39,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:18:39,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:18:39,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:18:39,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:18:39,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:18:39,453 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=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:18:39,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:18:39,750 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:18:39,754 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:18:39,755 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:18:39,756 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:18:39,756 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 20:18:39,836 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2ca9786c/a325594f20ac4f4b92e30eae1f5356c4/FLAG235860135 [2020-08-18 20:18:40,288 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:18:40,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-18 20:18:40,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2ca9786c/a325594f20ac4f4b92e30eae1f5356c4/FLAG235860135 [2020-08-18 20:18:40,604 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a2ca9786c/a325594f20ac4f4b92e30eae1f5356c4 [2020-08-18 20:18:40,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:18:40,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:18:40,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:40,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:18:40,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:18:40,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:40,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5e3f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40, skipping insertion in model container [2020-08-18 20:18:40,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:40,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:18:40,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:18:40,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:40,914 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:18:40,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:40,952 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:18:40,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40 WrapperNode [2020-08-18 20:18:40,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:40,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:18:40,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:18:40,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:18:40,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:40,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:41,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:41,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:41,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:41,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:41,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (1/1) ... [2020-08-18 20:18:41,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:18:41,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:18:41,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:18:41,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:18:41,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (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 [2020-08-18 20:18:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:18:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:18:41,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:18:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:18:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:18:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:18:41,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:18:41,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:18:41,442 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:18:41,443 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 20:18:41,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:41 BoogieIcfgContainer [2020-08-18 20:18:41,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:18:41,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:18:41,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:18:41,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:18:41,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:18:40" (1/3) ... [2020-08-18 20:18:41,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e680694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:41, skipping insertion in model container [2020-08-18 20:18:41,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:40" (2/3) ... [2020-08-18 20:18:41,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e680694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:41, skipping insertion in model container [2020-08-18 20:18:41,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:41" (3/3) ... [2020-08-18 20:18:41,464 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-18 20:18:41,480 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:18:41,489 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:18:41,517 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:18:41,556 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:18:41,556 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:18:41,556 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:18:41,557 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:18:41,557 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:18:41,557 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:18:41,557 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:18:41,557 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:18:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-18 20:18:41,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 20:18:41,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:41,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:41,582 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:41,587 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-18 20:18:41,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:41,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868311962] [2020-08-18 20:18:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:41,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:41,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868311962] [2020-08-18 20:18:41,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:41,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:41,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703893503] [2020-08-18 20:18:41,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:41,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:41,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:41,820 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-18 20:18:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:41,876 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-18 20:18:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:41,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 20:18:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:41,892 INFO L225 Difference]: With dead ends: 81 [2020-08-18 20:18:41,893 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 20:18:41,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 20:18:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-18 20:18:41,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 20:18:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-18 20:18:41,947 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-18 20:18:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:41,947 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-18 20:18:41,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-18 20:18:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 20:18:41,949 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:41,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:41,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:18:41,950 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-18 20:18:41,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:41,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631685023] [2020-08-18 20:18:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631685023] [2020-08-18 20:18:42,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240641256] [2020-08-18 20:18:42,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,022 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-18 20:18:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,052 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-18 20:18:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 20:18:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,055 INFO L225 Difference]: With dead ends: 107 [2020-08-18 20:18:42,056 INFO L226 Difference]: Without dead ends: 66 [2020-08-18 20:18:42,057 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 [2020-08-18 20:18:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-18 20:18:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-18 20:18:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 20:18:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-18 20:18:42,079 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-18 20:18:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,079 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-18 20:18:42,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-18 20:18:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 20:18:42,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 20:18:42,082 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-18 20:18:42,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760323333] [2020-08-18 20:18:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760323333] [2020-08-18 20:18:42,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906116008] [2020-08-18 20:18:42,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,161 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-18 20:18:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,227 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-18 20:18:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 20:18:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,231 INFO L225 Difference]: With dead ends: 99 [2020-08-18 20:18:42,232 INFO L226 Difference]: Without dead ends: 69 [2020-08-18 20:18:42,232 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 [2020-08-18 20:18:42,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-18 20:18:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-18 20:18:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 20:18:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-18 20:18:42,253 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-18 20:18:42,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,253 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-18 20:18:42,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-18 20:18:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 20:18:42,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 20:18:42,259 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-18 20:18:42,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323657661] [2020-08-18 20:18:42,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323657661] [2020-08-18 20:18:42,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469544442] [2020-08-18 20:18:42,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,326 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-18 20:18:42,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,360 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-18 20:18:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 20:18:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,362 INFO L225 Difference]: With dead ends: 124 [2020-08-18 20:18:42,363 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 20:18:42,363 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 [2020-08-18 20:18:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 20:18:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-18 20:18:42,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 20:18:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-18 20:18:42,378 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-18 20:18:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,378 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-18 20:18:42,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-18 20:18:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 20:18:42,379 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 20:18:42,380 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,381 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-18 20:18:42,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384402805] [2020-08-18 20:18:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384402805] [2020-08-18 20:18:42,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824683565] [2020-08-18 20:18:42,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,423 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-18 20:18:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,446 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-18 20:18:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 20:18:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,449 INFO L225 Difference]: With dead ends: 204 [2020-08-18 20:18:42,449 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 20:18:42,450 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 [2020-08-18 20:18:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 20:18:42,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-18 20:18:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-18 20:18:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-18 20:18:42,466 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-18 20:18:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,467 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-18 20:18:42,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-18 20:18:42,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 20:18:42,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 20:18:42,469 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-18 20:18:42,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224951690] [2020-08-18 20:18:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224951690] [2020-08-18 20:18:42,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412776239] [2020-08-18 20:18:42,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,514 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-18 20:18:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,554 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-18 20:18:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 20:18:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,557 INFO L225 Difference]: With dead ends: 183 [2020-08-18 20:18:42,557 INFO L226 Difference]: Without dead ends: 126 [2020-08-18 20:18:42,558 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 [2020-08-18 20:18:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-18 20:18:42,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-18 20:18:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-18 20:18:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-18 20:18:42,573 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-18 20:18:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,574 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-18 20:18:42,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-18 20:18:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 20:18:42,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 20:18:42,576 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-18 20:18:42,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903211090] [2020-08-18 20:18:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903211090] [2020-08-18 20:18:42,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924605508] [2020-08-18 20:18:42,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,621 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-18 20:18:42,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,660 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-18 20:18:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 20:18:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,663 INFO L225 Difference]: With dead ends: 228 [2020-08-18 20:18:42,663 INFO L226 Difference]: Without dead ends: 226 [2020-08-18 20:18:42,663 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 [2020-08-18 20:18:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-18 20:18:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-18 20:18:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 20:18:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-18 20:18:42,677 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-18 20:18:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,678 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-18 20:18:42,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-18 20:18:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 20:18:42,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 20:18:42,680 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-18 20:18:42,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322425688] [2020-08-18 20:18:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322425688] [2020-08-18 20:18:42,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852298091] [2020-08-18 20:18:42,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,712 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-18 20:18:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,731 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-18 20:18:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 20:18:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,734 INFO L225 Difference]: With dead ends: 392 [2020-08-18 20:18:42,734 INFO L226 Difference]: Without dead ends: 234 [2020-08-18 20:18:42,735 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 [2020-08-18 20:18:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-18 20:18:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-18 20:18:42,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 20:18:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-18 20:18:42,750 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-18 20:18:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,750 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-18 20:18:42,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-18 20:18:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:18:42,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 20:18:42,753 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-18 20:18:42,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224779935] [2020-08-18 20:18:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224779935] [2020-08-18 20:18:42,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426302541] [2020-08-18 20:18:42,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,783 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-18 20:18:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,802 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-18 20:18:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 20:18:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,804 INFO L225 Difference]: With dead ends: 348 [2020-08-18 20:18:42,804 INFO L226 Difference]: Without dead ends: 238 [2020-08-18 20:18:42,805 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 [2020-08-18 20:18:42,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-18 20:18:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-18 20:18:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-18 20:18:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-18 20:18:42,818 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-18 20:18:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,819 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-18 20:18:42,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-18 20:18:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:18:42,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 20:18:42,821 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-18 20:18:42,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693801803] [2020-08-18 20:18:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693801803] [2020-08-18 20:18:42,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242488785] [2020-08-18 20:18:42,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,853 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-18 20:18:42,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,881 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-18 20:18:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 20:18:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,887 INFO L225 Difference]: With dead ends: 428 [2020-08-18 20:18:42,887 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 20:18:42,888 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 [2020-08-18 20:18:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 20:18:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-18 20:18:42,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-18 20:18:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-18 20:18:42,902 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-18 20:18:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,903 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-18 20:18:42,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-18 20:18:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 20:18:42,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 20:18:42,906 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-18 20:18:42,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507628298] [2020-08-18 20:18:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:42,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507628298] [2020-08-18 20:18:42,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:42,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:42,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643172011] [2020-08-18 20:18:42,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:42,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:42,933 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-18 20:18:42,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:42,958 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-18 20:18:42,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:42,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 20:18:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:42,961 INFO L225 Difference]: With dead ends: 764 [2020-08-18 20:18:42,962 INFO L226 Difference]: Without dead ends: 450 [2020-08-18 20:18:42,964 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 [2020-08-18 20:18:42,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-18 20:18:42,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-18 20:18:42,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-18 20:18:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-18 20:18:42,981 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-18 20:18:42,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:42,981 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-18 20:18:42,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:42,981 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-18 20:18:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 20:18:42,983 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:42,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:42,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 20:18:42,983 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-18 20:18:42,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:42,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552314200] [2020-08-18 20:18:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552314200] [2020-08-18 20:18:43,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375880483] [2020-08-18 20:18:43,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,010 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-18 20:18:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,032 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-18 20:18:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 20:18:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,035 INFO L225 Difference]: With dead ends: 672 [2020-08-18 20:18:43,035 INFO L226 Difference]: Without dead ends: 458 [2020-08-18 20:18:43,037 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 [2020-08-18 20:18:43,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-18 20:18:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-18 20:18:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 20:18:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-18 20:18:43,052 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-18 20:18:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,052 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-18 20:18:43,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-18 20:18:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 20:18:43,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 20:18:43,054 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-18 20:18:43,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433363761] [2020-08-18 20:18:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433363761] [2020-08-18 20:18:43,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107778803] [2020-08-18 20:18:43,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,104 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-18 20:18:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,135 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-18 20:18:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 20:18:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,141 INFO L225 Difference]: With dead ends: 812 [2020-08-18 20:18:43,141 INFO L226 Difference]: Without dead ends: 810 [2020-08-18 20:18:43,142 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 [2020-08-18 20:18:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-18 20:18:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-18 20:18:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-18 20:18:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-18 20:18:43,163 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-18 20:18:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,163 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-18 20:18:43,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-18 20:18:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 20:18:43,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 20:18:43,165 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-18 20:18:43,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477555822] [2020-08-18 20:18:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477555822] [2020-08-18 20:18:43,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608417287] [2020-08-18 20:18:43,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,227 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-18 20:18:43,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,261 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-18 20:18:43,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 20:18:43,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,267 INFO L225 Difference]: With dead ends: 1500 [2020-08-18 20:18:43,267 INFO L226 Difference]: Without dead ends: 874 [2020-08-18 20:18:43,270 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 [2020-08-18 20:18:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-18 20:18:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-18 20:18:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-18 20:18:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-18 20:18:43,300 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-18 20:18:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,303 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-18 20:18:43,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-18 20:18:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:18:43,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 20:18:43,306 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,307 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-18 20:18:43,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988204799] [2020-08-18 20:18:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988204799] [2020-08-18 20:18:43,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560868084] [2020-08-18 20:18:43,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,359 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-18 20:18:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,399 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-18 20:18:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 20:18:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,405 INFO L225 Difference]: With dead ends: 1308 [2020-08-18 20:18:43,405 INFO L226 Difference]: Without dead ends: 890 [2020-08-18 20:18:43,409 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 [2020-08-18 20:18:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-18 20:18:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-18 20:18:43,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-18 20:18:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-18 20:18:43,444 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-18 20:18:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,444 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-18 20:18:43,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-18 20:18:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:18:43,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 20:18:43,447 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-18 20:18:43,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815074123] [2020-08-18 20:18:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815074123] [2020-08-18 20:18:43,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110486218] [2020-08-18 20:18:43,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,490 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-18 20:18:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,539 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-18 20:18:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,539 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 20:18:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,547 INFO L225 Difference]: With dead ends: 1548 [2020-08-18 20:18:43,547 INFO L226 Difference]: Without dead ends: 1546 [2020-08-18 20:18:43,548 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 [2020-08-18 20:18:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-18 20:18:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-18 20:18:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-18 20:18:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-18 20:18:43,586 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-18 20:18:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,586 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-18 20:18:43,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-18 20:18:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 20:18:43,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 20:18:43,590 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-18 20:18:43,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378830420] [2020-08-18 20:18:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378830420] [2020-08-18 20:18:43,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341398144] [2020-08-18 20:18:43,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,616 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-18 20:18:43,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,658 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-18 20:18:43,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 20:18:43,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,671 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 20:18:43,671 INFO L226 Difference]: Without dead ends: 1706 [2020-08-18 20:18:43,675 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 [2020-08-18 20:18:43,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-18 20:18:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-18 20:18:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-18 20:18:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-18 20:18:43,743 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-18 20:18:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,743 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-18 20:18:43,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-18 20:18:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:18:43,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 20:18:43,749 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-18 20:18:43,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950250507] [2020-08-18 20:18:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950250507] [2020-08-18 20:18:43,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890910163] [2020-08-18 20:18:43,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,774 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-18 20:18:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:43,826 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-18 20:18:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:43,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 20:18:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:43,836 INFO L225 Difference]: With dead ends: 2556 [2020-08-18 20:18:43,837 INFO L226 Difference]: Without dead ends: 1738 [2020-08-18 20:18:43,840 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 [2020-08-18 20:18:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-18 20:18:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-18 20:18:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-18 20:18:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-18 20:18:43,914 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-18 20:18:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:43,915 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-18 20:18:43,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-18 20:18:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:18:43,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:43,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:43,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 20:18:43,920 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-18 20:18:43,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:43,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70536801] [2020-08-18 20:18:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:43,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70536801] [2020-08-18 20:18:43,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:43,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:43,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746474284] [2020-08-18 20:18:43,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:43,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:43,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:43,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:43,944 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-18 20:18:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:44,006 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-18 20:18:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:44,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 20:18:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:44,024 INFO L225 Difference]: With dead ends: 2956 [2020-08-18 20:18:44,024 INFO L226 Difference]: Without dead ends: 2954 [2020-08-18 20:18:44,026 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 [2020-08-18 20:18:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-18 20:18:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-18 20:18:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-18 20:18:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-18 20:18:44,124 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-18 20:18:44,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:44,124 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-18 20:18:44,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-18 20:18:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 20:18:44,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:44,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:44,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 20:18:44,129 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:44,130 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-18 20:18:44,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:44,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380610539] [2020-08-18 20:18:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:44,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380610539] [2020-08-18 20:18:44,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:44,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:44,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259908862] [2020-08-18 20:18:44,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:44,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:44,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:44,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:44,156 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-18 20:18:44,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:44,225 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-18 20:18:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:44,226 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 20:18:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:44,242 INFO L225 Difference]: With dead ends: 5836 [2020-08-18 20:18:44,242 INFO L226 Difference]: Without dead ends: 3338 [2020-08-18 20:18:44,248 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 [2020-08-18 20:18:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-18 20:18:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-18 20:18:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-18 20:18:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-18 20:18:44,356 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-18 20:18:44,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:44,356 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-18 20:18:44,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-18 20:18:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:18:44,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:44,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:44,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 20:18:44,362 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:44,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:44,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-18 20:18:44,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:44,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524627913] [2020-08-18 20:18:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:44,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524627913] [2020-08-18 20:18:44,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:44,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:44,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009590348] [2020-08-18 20:18:44,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:44,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:44,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:44,386 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-18 20:18:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:44,447 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-18 20:18:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:44,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 20:18:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:44,464 INFO L225 Difference]: With dead ends: 5004 [2020-08-18 20:18:44,464 INFO L226 Difference]: Without dead ends: 3402 [2020-08-18 20:18:44,468 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 [2020-08-18 20:18:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-18 20:18:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-18 20:18:44,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-18 20:18:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-18 20:18:44,597 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-18 20:18:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:44,597 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-18 20:18:44,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-18 20:18:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:18:44,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:44,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:44,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 20:18:44,603 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:44,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-18 20:18:44,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:44,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553877786] [2020-08-18 20:18:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:44,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553877786] [2020-08-18 20:18:44,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:44,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:44,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530942744] [2020-08-18 20:18:44,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:44,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:44,628 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-18 20:18:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:44,734 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-18 20:18:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:44,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 20:18:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:44,764 INFO L225 Difference]: With dead ends: 9804 [2020-08-18 20:18:44,764 INFO L226 Difference]: Without dead ends: 6538 [2020-08-18 20:18:44,771 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 [2020-08-18 20:18:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-18 20:18:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-18 20:18:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 20:18:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-18 20:18:44,954 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-18 20:18:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:44,955 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-18 20:18:44,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-18 20:18:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 20:18:44,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:44,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:44,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 20:18:44,964 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-18 20:18:44,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:44,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180703712] [2020-08-18 20:18:44,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:44,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180703712] [2020-08-18 20:18:44,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:44,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:44,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163905426] [2020-08-18 20:18:44,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:44,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:44,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:44,987 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-18 20:18:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:45,164 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-18 20:18:45,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:45,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 20:18:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:45,182 INFO L225 Difference]: With dead ends: 7052 [2020-08-18 20:18:45,182 INFO L226 Difference]: Without dead ends: 7050 [2020-08-18 20:18:45,184 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 [2020-08-18 20:18:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-18 20:18:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-18 20:18:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-18 20:18:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-18 20:18:45,351 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-18 20:18:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:45,351 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-18 20:18:45,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-18 20:18:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 20:18:45,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:45,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:45,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 20:18:45,361 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-18 20:18:45,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:45,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90453292] [2020-08-18 20:18:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:45,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:45,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90453292] [2020-08-18 20:18:45,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:45,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:45,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683787388] [2020-08-18 20:18:45,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:45,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:45,382 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-18 20:18:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:45,533 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-18 20:18:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:45,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 20:18:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:45,554 INFO L225 Difference]: With dead ends: 10634 [2020-08-18 20:18:45,554 INFO L226 Difference]: Without dead ends: 10632 [2020-08-18 20:18:45,559 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 [2020-08-18 20:18:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-18 20:18:45,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-18 20:18:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-18 20:18:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-18 20:18:45,794 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-18 20:18:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:45,794 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-18 20:18:45,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-18 20:18:45,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 20:18:45,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:45,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:45,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 20:18:45,812 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-18 20:18:45,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:45,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819198663] [2020-08-18 20:18:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:45,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 20:18:45,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819198663] [2020-08-18 20:18:45,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:45,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 20:18:45,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80903786] [2020-08-18 20:18:45,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 20:18:45,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 20:18:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 20:18:45,833 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-18 20:18:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:46,012 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-18 20:18:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 20:18:46,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 20:18:46,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:46,013 INFO L225 Difference]: With dead ends: 22664 [2020-08-18 20:18:46,013 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:18:46,048 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 [2020-08-18 20:18:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:18:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:18:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:18:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:18:46,049 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-18 20:18:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:46,050 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:18:46,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 20:18:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:18:46,050 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:18:46,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 20:18:46,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:18:46,074 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 20:18:46,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:46,074 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:46,075 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:18:46,075 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:18:46,075 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:18:46,075 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,075 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-18 20:18:46,075 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,075 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-18 20:18:46,075 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,076 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-18 20:18:46,076 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,076 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-18 20:18:46,076 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,076 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,076 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-18 20:18:46,076 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-18 20:18:46,076 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-18 20:18:46,077 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,077 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-18 20:18:46,077 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,077 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-18 20:18:46,077 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-18 20:18:46,077 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-18 20:18:46,077 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-18 20:18:46,077 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,078 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,078 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,078 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-18 20:18:46,078 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,078 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,078 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-18 20:18:46,078 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-18 20:18:46,078 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-18 20:18:46,078 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,079 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,079 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-18 20:18:46,079 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-18 20:18:46,079 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,079 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-18 20:18:46,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:18:46 BoogieIcfgContainer [2020-08-18 20:18:46,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:18:46,093 INFO L168 Benchmark]: Toolchain (without parser) took 5476.41 ms. Allocated memory was 145.8 MB in the beginning and 338.2 MB in the end (delta: 192.4 MB). Free memory was 102.7 MB in the beginning and 123.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 171.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:46,094 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 20:18:46,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.75 ms. Allocated memory is still 145.8 MB. Free memory was 102.5 MB in the beginning and 92.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:46,095 INFO L168 Benchmark]: Boogie Preprocessor took 139.63 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.0 MB in the beginning and 180.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:46,095 INFO L168 Benchmark]: RCFGBuilder took 355.28 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 162.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:46,096 INFO L168 Benchmark]: TraceAbstraction took 4636.98 ms. Allocated memory was 202.9 MB in the beginning and 338.2 MB in the end (delta: 135.3 MB). Free memory was 161.4 MB in the beginning and 123.9 MB in the end (delta: 37.6 MB). Peak memory consumption was 172.8 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:46,098 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 145.8 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 335.75 ms. Allocated memory is still 145.8 MB. Free memory was 102.5 MB in the beginning and 92.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.63 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 92.0 MB in the beginning and 180.9 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 355.28 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 162.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4636.98 ms. Allocated memory was 202.9 MB in the beginning and 338.2 MB in the end (delta: 135.3 MB). Free memory was 161.4 MB in the beginning and 123.9 MB in the end (delta: 37.6 MB). Peak memory consumption was 172.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...