/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:42:00,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:42:00,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:42:00,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:42:00,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:42:00,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:42:00,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:42:00,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:42:00,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:42:00,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:42:00,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:42:00,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:42:00,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:42:00,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:42:00,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:42:00,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:42:00,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:42:00,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:42:00,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:42:00,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:42:00,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:42:00,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:42:00,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:42:00,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:42:00,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:42:00,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:42:00,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:42:00,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:42:00,625 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 18:42:00,674 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:42:00,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:42:00,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:42:00,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:42:00,679 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:42:00,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:42:00,680 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:42:00,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:42:00,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:42:00,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:42:00,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:42:00,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:42:00,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:42:00,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:42:00,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:42:00,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:42:00,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:42:00,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:42:00,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:42:00,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:42:00,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:42:00,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:42:00,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:42:00,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:42:00,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:42:00,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:42:00,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:42:00,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:42:00,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:42:00,688 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:42:01,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:42:01,054 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:42:01,058 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:42:01,059 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:42:01,060 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:42:01,061 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 18:42:01,122 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93cfb57c4/c59c3484e4774f468e1bf0a1d3af172d/FLAG15e699e3a [2020-08-18 18:42:01,600 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:42:01,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-18 18:42:01,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93cfb57c4/c59c3484e4774f468e1bf0a1d3af172d/FLAG15e699e3a [2020-08-18 18:42:01,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/93cfb57c4/c59c3484e4774f468e1bf0a1d3af172d [2020-08-18 18:42:01,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:42:01,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:42:01,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:01,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:42:01,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:42:01,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:01" (1/1) ... [2020-08-18 18:42:01,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d87313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:01, skipping insertion in model container [2020-08-18 18:42:01,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:01" (1/1) ... [2020-08-18 18:42:01,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:42:02,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:42:02,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:02,261 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:42:02,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:02,425 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:42:02,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02 WrapperNode [2020-08-18 18:42:02,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:02,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:42:02,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:42:02,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:42:02,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (1/1) ... [2020-08-18 18:42:02,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (1/1) ... [2020-08-18 18:42:02,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (1/1) ... [2020-08-18 18:42:02,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (1/1) ... [2020-08-18 18:42:02,462 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (1/1) ... [2020-08-18 18:42:02,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (1/1) ... [2020-08-18 18:42:02,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (1/1) ... [2020-08-18 18:42:02,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:42:02,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:42:02,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:42:02,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:42:02,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (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 18:42:02,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:42:02,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:42:02,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:42:02,534 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:42:02,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:42:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:42:02,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:42:02,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:42:02,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:42:02,783 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:42:02,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:02 BoogieIcfgContainer [2020-08-18 18:42:02,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:42:02,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:42:02,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:42:02,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:42:02,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:42:01" (1/3) ... [2020-08-18 18:42:02,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699d881d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:02, skipping insertion in model container [2020-08-18 18:42:02,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02" (2/3) ... [2020-08-18 18:42:02,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@699d881d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:02, skipping insertion in model container [2020-08-18 18:42:02,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:02" (3/3) ... [2020-08-18 18:42:02,795 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-18 18:42:02,806 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:42:02,814 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:42:02,831 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:42:02,874 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:42:02,875 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:42:02,875 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:42:02,875 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:42:02,875 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:42:02,876 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:42:02,876 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:42:02,876 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:42:02,904 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-18 18:42:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:02,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,914 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-18 18:42:02,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803533884] [2020-08-18 18:42:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,134 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 18:42:03,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803533884] [2020-08-18 18:42:03,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228508429] [2020-08-18 18:42:03,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,158 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-18 18:42:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,222 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-18 18:42:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,237 INFO L225 Difference]: With dead ends: 69 [2020-08-18 18:42:03,237 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 18:42:03,241 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 18:42:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 18:42:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-18 18:42:03,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 18:42:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-18 18:42:03,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-18 18:42:03,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,286 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-18 18:42:03,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-18 18:42:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:03,287 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,287 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:03,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:42:03,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-18 18:42:03,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591134450] [2020-08-18 18:42:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,351 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 18:42:03,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591134450] [2020-08-18 18:42:03,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204804176] [2020-08-18 18:42:03,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,356 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-18 18:42:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,384 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-18 18:42:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,389 INFO L225 Difference]: With dead ends: 87 [2020-08-18 18:42:03,390 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 18:42:03,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 18:42:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-18 18:42:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-18 18:42:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-18 18:42:03,402 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-18 18:42:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,402 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-18 18:42:03,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-18 18:42:03,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:03,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:03,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:42:03,405 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-18 18:42:03,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400462363] [2020-08-18 18:42:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,490 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 18:42:03,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400462363] [2020-08-18 18:42:03,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207313776] [2020-08-18 18:42:03,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,494 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-18 18:42:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,517 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-18 18:42:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,519 INFO L225 Difference]: With dead ends: 81 [2020-08-18 18:42:03,519 INFO L226 Difference]: Without dead ends: 57 [2020-08-18 18:42:03,520 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 18:42:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-18 18:42:03,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-18 18:42:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-18 18:42:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-18 18:42:03,530 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-18 18:42:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,530 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-18 18:42:03,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-18 18:42:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:03,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:03,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:42:03,533 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-18 18:42:03,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346105587] [2020-08-18 18:42:03,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:03,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346105587] [2020-08-18 18:42:03,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359870635] [2020-08-18 18:42:03,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,584 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-18 18:42:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,616 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-18 18:42:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,618 INFO L225 Difference]: With dead ends: 100 [2020-08-18 18:42:03,618 INFO L226 Difference]: Without dead ends: 98 [2020-08-18 18:42:03,619 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 18:42:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-18 18:42:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-18 18:42:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 18:42:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-18 18:42:03,630 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-18 18:42:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,631 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-18 18:42:03,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-18 18:42:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:03,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:03,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:42:03,633 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-18 18:42:03,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838106736] [2020-08-18 18:42:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,674 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 18:42:03,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838106736] [2020-08-18 18:42:03,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128658104] [2020-08-18 18:42:03,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,677 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-18 18:42:03,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,700 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-18 18:42:03,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:03,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,703 INFO L225 Difference]: With dead ends: 164 [2020-08-18 18:42:03,703 INFO L226 Difference]: Without dead ends: 100 [2020-08-18 18:42:03,704 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 18:42:03,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-18 18:42:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-18 18:42:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-18 18:42:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-18 18:42:03,716 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-18 18:42:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,717 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-18 18:42:03,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-18 18:42:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:03,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,719 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 18:42:03,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:42:03,719 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-18 18:42:03,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364407177] [2020-08-18 18:42:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,773 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 18:42:03,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364407177] [2020-08-18 18:42:03,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227785555] [2020-08-18 18:42:03,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,780 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-18 18:42:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,808 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-18 18:42:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,810 INFO L225 Difference]: With dead ends: 147 [2020-08-18 18:42:03,811 INFO L226 Difference]: Without dead ends: 102 [2020-08-18 18:42:03,812 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 18:42:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-18 18:42:03,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-18 18:42:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-18 18:42:03,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-18 18:42:03,823 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-18 18:42:03,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,824 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-18 18:42:03,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,824 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-18 18:42:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:03,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,827 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 18:42:03,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:42:03,827 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-18 18:42:03,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760331892] [2020-08-18 18:42:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,865 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 18:42:03,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760331892] [2020-08-18 18:42:03,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4831818] [2020-08-18 18:42:03,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,868 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-18 18:42:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,889 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-18 18:42:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,902 INFO L225 Difference]: With dead ends: 180 [2020-08-18 18:42:03,903 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 18:42:03,904 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 18:42:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 18:42:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-18 18:42:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-18 18:42:03,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-18 18:42:03,923 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-18 18:42:03,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,923 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-18 18:42:03,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-18 18:42:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:03,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,926 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 18:42:03,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:42:03,930 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-18 18:42:03,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099238792] [2020-08-18 18:42:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,990 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 18:42:03,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099238792] [2020-08-18 18:42:03,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532906678] [2020-08-18 18:42:04,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,001 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-18 18:42:04,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,023 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-18 18:42:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:04,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,025 INFO L225 Difference]: With dead ends: 312 [2020-08-18 18:42:04,026 INFO L226 Difference]: Without dead ends: 186 [2020-08-18 18:42:04,027 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 18:42:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-18 18:42:04,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-18 18:42:04,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-18 18:42:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-18 18:42:04,041 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-18 18:42:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,041 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-18 18:42:04,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,042 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-18 18:42:04,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:04,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,043 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 18:42:04,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:42:04,044 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-18 18:42:04,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972891156] [2020-08-18 18:42:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:04,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972891156] [2020-08-18 18:42:04,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213699261] [2020-08-18 18:42:04,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,075 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-18 18:42:04,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,093 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-18 18:42:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,096 INFO L225 Difference]: With dead ends: 276 [2020-08-18 18:42:04,096 INFO L226 Difference]: Without dead ends: 190 [2020-08-18 18:42:04,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-18 18:42:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-18 18:42:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-18 18:42:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-18 18:42:04,116 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-18 18:42:04,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,117 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-18 18:42:04,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,117 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-18 18:42:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:04,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,121 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 18:42:04,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:42:04,121 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-18 18:42:04,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021483169] [2020-08-18 18:42:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,159 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 18:42:04,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021483169] [2020-08-18 18:42:04,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601371230] [2020-08-18 18:42:04,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,162 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-18 18:42:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,183 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-18 18:42:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:04,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,186 INFO L225 Difference]: With dead ends: 332 [2020-08-18 18:42:04,186 INFO L226 Difference]: Without dead ends: 330 [2020-08-18 18:42:04,187 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 18:42:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-18 18:42:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-18 18:42:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-18 18:42:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-18 18:42:04,201 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-18 18:42:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,201 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-18 18:42:04,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-18 18:42:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:04,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,204 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 18:42:04,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:42:04,204 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-18 18:42:04,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071819957] [2020-08-18 18:42:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,233 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 18:42:04,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071819957] [2020-08-18 18:42:04,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959867380] [2020-08-18 18:42:04,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,235 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-18 18:42:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,260 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-18 18:42:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,264 INFO L225 Difference]: With dead ends: 604 [2020-08-18 18:42:04,264 INFO L226 Difference]: Without dead ends: 354 [2020-08-18 18:42:04,266 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 18:42:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-18 18:42:04,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-18 18:42:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-18 18:42:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-18 18:42:04,282 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-18 18:42:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,283 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-18 18:42:04,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-18 18:42:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:04,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,285 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 18:42:04,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:42:04,286 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-18 18:42:04,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215867202] [2020-08-18 18:42:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,314 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 18:42:04,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215867202] [2020-08-18 18:42:04,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406773504] [2020-08-18 18:42:04,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,318 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-18 18:42:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,346 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-18 18:42:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,349 INFO L225 Difference]: With dead ends: 528 [2020-08-18 18:42:04,350 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 18:42:04,351 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 18:42:04,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 18:42:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-18 18:42:04,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-18 18:42:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-18 18:42:04,373 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-18 18:42:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,375 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-18 18:42:04,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-18 18:42:04,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:04,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,379 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 18:42:04,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:42:04,387 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-18 18:42:04,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000531715] [2020-08-18 18:42:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,428 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 18:42:04,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000531715] [2020-08-18 18:42:04,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375270507] [2020-08-18 18:42:04,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,430 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-18 18:42:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,463 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-18 18:42:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:04,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,468 INFO L225 Difference]: With dead ends: 620 [2020-08-18 18:42:04,468 INFO L226 Difference]: Without dead ends: 618 [2020-08-18 18:42:04,469 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 18:42:04,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-18 18:42:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-18 18:42:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-18 18:42:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-18 18:42:04,490 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-18 18:42:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,491 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-18 18:42:04,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-18 18:42:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:04,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,493 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 18:42:04,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:42:04,494 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-18 18:42:04,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990632856] [2020-08-18 18:42:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,529 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 18:42:04,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990632856] [2020-08-18 18:42:04,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458489324] [2020-08-18 18:42:04,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,533 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-18 18:42:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,570 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-18 18:42:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,574 INFO L225 Difference]: With dead ends: 1180 [2020-08-18 18:42:04,574 INFO L226 Difference]: Without dead ends: 682 [2020-08-18 18:42:04,576 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 18:42:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-18 18:42:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-18 18:42:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-18 18:42:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-18 18:42:04,599 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-18 18:42:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,599 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-18 18:42:04,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,600 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-18 18:42:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:42:04,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,602 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 18:42:04,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:42:04,603 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-18 18:42:04,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482305048] [2020-08-18 18:42:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,650 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 18:42:04,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482305048] [2020-08-18 18:42:04,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838927509] [2020-08-18 18:42:04,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,653 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-18 18:42:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,683 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-18 18:42:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 18:42:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,688 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 18:42:04,688 INFO L226 Difference]: Without dead ends: 698 [2020-08-18 18:42:04,690 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 18:42:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-18 18:42:04,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-18 18:42:04,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-18 18:42:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-18 18:42:04,715 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-18 18:42:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,715 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-18 18:42:04,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-18 18:42:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:42:04,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:04,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:42:04,718 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-18 18:42:04,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310123619] [2020-08-18 18:42:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,740 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 18:42:04,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310123619] [2020-08-18 18:42:04,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361758118] [2020-08-18 18:42:04,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,743 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-18 18:42:04,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,786 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-18 18:42:04,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 18:42:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,792 INFO L225 Difference]: With dead ends: 1164 [2020-08-18 18:42:04,792 INFO L226 Difference]: Without dead ends: 1162 [2020-08-18 18:42:04,793 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 18:42:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-18 18:42:04,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-18 18:42:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-18 18:42:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-18 18:42:04,825 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-18 18:42:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,826 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-18 18:42:04,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-18 18:42:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:42:04,828 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,829 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 18:42:04,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 18:42:04,829 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,829 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-18 18:42:04,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965061046] [2020-08-18 18:42:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,850 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 18:42:04,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965061046] [2020-08-18 18:42:04,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000132857] [2020-08-18 18:42:04,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,852 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-18 18:42:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,903 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-18 18:42:04,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 18:42:04,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,911 INFO L225 Difference]: With dead ends: 2316 [2020-08-18 18:42:04,911 INFO L226 Difference]: Without dead ends: 1322 [2020-08-18 18:42:04,914 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 18:42:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-18 18:42:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-18 18:42:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-18 18:42:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-18 18:42:04,975 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-18 18:42:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,975 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-18 18:42:04,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-18 18:42:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:42:04,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,979 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 18:42:04,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 18:42:04,980 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,980 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-18 18:42:04,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540434906] [2020-08-18 18:42:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,002 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 18:42:05,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540434906] [2020-08-18 18:42:05,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465080774] [2020-08-18 18:42:05,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,005 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-18 18:42:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,053 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-18 18:42:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 18:42:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,063 INFO L225 Difference]: With dead ends: 1980 [2020-08-18 18:42:05,063 INFO L226 Difference]: Without dead ends: 1354 [2020-08-18 18:42:05,066 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 18:42:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-18 18:42:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-18 18:42:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-18 18:42:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-18 18:42:05,128 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-18 18:42:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,128 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-18 18:42:05,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-18 18:42:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:42:05,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,132 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 18:42:05,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 18:42:05,132 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-18 18:42:05,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523851987] [2020-08-18 18:42:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:05,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523851987] [2020-08-18 18:42:05,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356799420] [2020-08-18 18:42:05,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,159 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-18 18:42:05,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,229 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-18 18:42:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 18:42:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,243 INFO L225 Difference]: With dead ends: 2186 [2020-08-18 18:42:05,244 INFO L226 Difference]: Without dead ends: 2184 [2020-08-18 18:42:05,245 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 18:42:05,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-18 18:42:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-18 18:42:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-18 18:42:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-18 18:42:05,317 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-18 18:42:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,318 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-18 18:42:05,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-18 18:42:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:42:05,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:05,322 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 18:42:05,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 18:42:05,322 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-18 18:42:05,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:05,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375759647] [2020-08-18 18:42:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:05,340 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 18:42:05,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375759647] [2020-08-18 18:42:05,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:05,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:05,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861046377] [2020-08-18 18:42:05,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:05,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:05,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:05,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:05,343 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-18 18:42:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:05,435 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-18 18:42:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:05,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 18:42:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:05,436 INFO L225 Difference]: With dead ends: 4552 [2020-08-18 18:42:05,436 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:42:05,443 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 18:42:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:42:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:42:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:42:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:42:05,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-18 18:42:05,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:05,444 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:42:05,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:42:05,444 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:42:05,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 18:42:05,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:42:05,470 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:42:05,470 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:05,470 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:05,470 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:42:05,471 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:42:05,471 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:42:05,471 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-18 18:42:05,471 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-18 18:42:05,471 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,471 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-18 18:42:05,471 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-18 18:42:05,471 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-18 18:42:05,472 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-18 18:42:05,472 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-18 18:42:05,472 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,472 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-18 18:42:05,472 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,472 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,472 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-18 18:42:05,472 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,473 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,474 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,474 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-18 18:42:05,474 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,474 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-18 18:42:05,474 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-18 18:42:05,474 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,474 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-18 18:42:05,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:42:05 BoogieIcfgContainer [2020-08-18 18:42:05,486 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:42:05,488 INFO L168 Benchmark]: Toolchain (without parser) took 3514.72 ms. Allocated memory was 141.0 MB in the beginning and 243.3 MB in the end (delta: 102.2 MB). Free memory was 104.2 MB in the beginning and 193.8 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:05,489 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:42:05,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 454.71 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 104.0 MB in the beginning and 183.6 MB in the end (delta: -79.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:05,490 INFO L168 Benchmark]: Boogie Preprocessor took 52.64 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 181.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:05,491 INFO L168 Benchmark]: RCFGBuilder took 304.89 ms. Allocated memory is still 204.5 MB. Free memory was 181.3 MB in the beginning and 164.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:05,491 INFO L168 Benchmark]: TraceAbstraction took 2697.51 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 164.4 MB in the beginning and 193.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:05,494 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 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 454.71 ms. Allocated memory was 141.0 MB in the beginning and 204.5 MB in the end (delta: 63.4 MB). Free memory was 104.0 MB in the beginning and 183.6 MB in the end (delta: -79.6 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.64 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 181.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.89 ms. Allocated memory is still 204.5 MB. Free memory was 181.3 MB in the beginning and 164.4 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2697.51 ms. Allocated memory was 204.5 MB in the beginning and 243.3 MB in the end (delta: 38.8 MB). Free memory was 164.4 MB in the beginning and 193.8 MB in the end (delta: -29.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...