/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_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:42:00,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:42:00,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:42:00,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:42:00,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:42:00,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:42:00,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:42:00,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:42:00,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:42:00,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:42:00,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:42:00,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:42:00,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:42:00,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:42:00,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:42:00,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:42:00,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:42:00,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:42:00,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:42:00,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:42:00,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:42:00,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:42:00,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:42:00,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:42:00,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:42:00,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:42:00,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:42:00,416 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:42:00,417 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 18:42:00,465 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:42:00,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:42:00,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:42:00,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:42:00,473 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:42:00,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:42:00,473 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:42:00,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:42:00,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:42:00,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:42:00,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:42:00,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:42:00,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:42:00,475 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:42:00,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:42:00,475 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:42:00,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:42:00,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:42:00,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:42:00,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:42:00,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:42:00,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:42:00,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:42:00,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:42:00,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:42:00,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:42:00,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:42:00,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:42:00,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:42:00,480 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 18:42:00,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:42:00,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:42:00,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:42:00,860 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:42:00,860 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:42:00,861 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-18 18:42:00,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ad0487d/fc5c0126a6f84390a87dca7364b60923/FLAG7fd1d7ea2 [2020-08-18 18:42:01,383 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:42:01,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-18 18:42:01,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ad0487d/fc5c0126a6f84390a87dca7364b60923/FLAG7fd1d7ea2 [2020-08-18 18:42:01,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30ad0487d/fc5c0126a6f84390a87dca7364b60923 [2020-08-18 18:42:01,796 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:42:01,798 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:42:01,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:01,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:42:01,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:42:01,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:01" (1/1) ... [2020-08-18 18:42:01,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d8d2ad 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 18:42:01,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:01" (1/1) ... [2020-08-18 18:42:01,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:42:01,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:42:02,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:02,121 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:42:02,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:42:02,169 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:42:02,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:02 WrapperNode [2020-08-18 18:42:02,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:42:02,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:42:02,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:42:02,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:42:02,261 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 18:42:02,261 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 18:42:02,268 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 18:42:02,268 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 18:42:02,273 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 18:42:02,280 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 18:42:02,281 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 18:42:02,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:42:02,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:42:02,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:42:02,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:42:02,285 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 18:42:02,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:42:02,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:42:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:42:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:42:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:42:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:42:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:42:02,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:42:02,583 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:42:02,583 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:42:02,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:02 BoogieIcfgContainer [2020-08-18 18:42:02,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:42:02,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:42:02,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:42:02,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:42:02,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:42:01" (1/3) ... [2020-08-18 18:42:02,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e1bdb8 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 18:42:02,594 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 18:42:02,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e1bdb8 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 18:42:02,595 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 18:42:02,596 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-18 18:42:02,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:42:02,616 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:42:02,632 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:42:02,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:42:02,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:42:02,665 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:42:02,665 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:42:02,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:42:02,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:42:02,666 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:42:02,666 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:42:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-18 18:42:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:42:02,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:02,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:02,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:02,730 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-18 18:42:02,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:02,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470363038] [2020-08-18 18:42:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:02,968 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 18:42:02,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470363038] [2020-08-18 18:42:02,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:02,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:02,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613692014] [2020-08-18 18:42:02,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:02,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:02,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:02,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:02,999 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-18 18:42:03,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,060 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-18 18:42:03,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 18:42:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,081 INFO L225 Difference]: With dead ends: 63 [2020-08-18 18:42:03,082 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 18:42:03,086 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 18:42:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 18:42:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-18 18:42:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 18:42:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-18 18:42:03,129 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-18 18:42:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,130 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-18 18:42:03,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,130 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-18 18:42:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:42:03,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:42:03,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:42:03,132 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-18 18:42:03,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977838476] [2020-08-18 18:42:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,193 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 18:42:03,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977838476] [2020-08-18 18:42:03,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423921857] [2020-08-18 18:42:03,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,198 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-18 18:42:03,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,223 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-18 18:42:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-18 18:42:03,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,226 INFO L225 Difference]: With dead ends: 77 [2020-08-18 18:42:03,226 INFO L226 Difference]: Without dead ends: 48 [2020-08-18 18:42:03,228 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 18:42:03,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-18 18:42:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-18 18:42:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 18:42:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-18 18:42:03,237 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-18 18:42:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,238 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-18 18:42:03,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-18 18:42:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:03,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,239 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 18:42:03,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:42:03,240 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,240 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-18 18:42:03,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616258730] [2020-08-18 18:42:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:03,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616258730] [2020-08-18 18:42:03,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480523366] [2020-08-18 18:42:03,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,293 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-18 18:42:03,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,322 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-18 18:42:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,324 INFO L225 Difference]: With dead ends: 72 [2020-08-18 18:42:03,324 INFO L226 Difference]: Without dead ends: 51 [2020-08-18 18:42:03,325 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 18:42:03,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-18 18:42:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-18 18:42:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-18 18:42:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-18 18:42:03,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-18 18:42:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,339 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-18 18:42:03,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-18 18:42:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:03,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,340 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 18:42:03,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:42:03,341 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,342 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-18 18:42:03,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640541741] [2020-08-18 18:42:03,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:03,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640541741] [2020-08-18 18:42:03,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997788525] [2020-08-18 18:42:03,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,387 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-18 18:42:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,409 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-18 18:42:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,412 INFO L225 Difference]: With dead ends: 88 [2020-08-18 18:42:03,412 INFO L226 Difference]: Without dead ends: 86 [2020-08-18 18:42:03,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-18 18:42:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-18 18:42:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-18 18:42:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-18 18:42:03,425 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-18 18:42:03,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,425 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-18 18:42:03,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-18 18:42:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 18:42:03,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,427 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 18:42:03,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:42:03,428 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-18 18:42:03,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984911127] [2020-08-18 18:42:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:03,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984911127] [2020-08-18 18:42:03,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634827815] [2020-08-18 18:42:03,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,484 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-18 18:42:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,519 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-18 18:42:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-18 18:42:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,522 INFO L225 Difference]: With dead ends: 144 [2020-08-18 18:42:03,522 INFO L226 Difference]: Without dead ends: 88 [2020-08-18 18:42:03,523 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 18:42:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-18 18:42:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-18 18:42:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-18 18:42:03,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-18 18:42:03,539 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-18 18:42:03,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,539 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-18 18:42:03,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,540 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-18 18:42:03,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:03,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,541 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 18:42:03,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:42:03,542 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-18 18:42:03,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052286838] [2020-08-18 18:42:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,606 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 18:42:03,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052286838] [2020-08-18 18:42:03,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917858256] [2020-08-18 18:42:03,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,611 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-18 18:42:03,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,658 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-18 18:42:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,662 INFO L225 Difference]: With dead ends: 129 [2020-08-18 18:42:03,664 INFO L226 Difference]: Without dead ends: 90 [2020-08-18 18:42:03,665 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 18:42:03,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-18 18:42:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-18 18:42:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-18 18:42:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-18 18:42:03,677 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-18 18:42:03,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,678 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-18 18:42:03,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-18 18:42:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:03,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,680 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 18:42:03,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:42:03,680 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,681 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-18 18:42:03,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415906959] [2020-08-18 18:42:03,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,715 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 18:42:03,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415906959] [2020-08-18 18:42:03,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720574307] [2020-08-18 18:42:03,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,718 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-18 18:42:03,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,738 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-18 18:42:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:03,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,741 INFO L225 Difference]: With dead ends: 156 [2020-08-18 18:42:03,741 INFO L226 Difference]: Without dead ends: 154 [2020-08-18 18:42:03,742 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 18:42:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-18 18:42:03,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-18 18:42:03,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 18:42:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-18 18:42:03,757 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-18 18:42:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,758 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-18 18:42:03,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-18 18:42:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:42:03,759 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,760 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 18:42:03,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:42:03,760 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-18 18:42:03,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226461635] [2020-08-18 18:42:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,803 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 18:42:03,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226461635] [2020-08-18 18:42:03,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440801189] [2020-08-18 18:42:03,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,818 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-18 18:42:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,841 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-18 18:42:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-18 18:42:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,843 INFO L225 Difference]: With dead ends: 272 [2020-08-18 18:42:03,844 INFO L226 Difference]: Without dead ends: 162 [2020-08-18 18:42:03,845 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 18:42:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-18 18:42:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-18 18:42:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 18:42:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-18 18:42:03,860 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-18 18:42:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,861 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-18 18:42:03,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-18 18:42:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:03,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,863 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 18:42:03,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:42:03,863 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-18 18:42:03,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463151137] [2020-08-18 18:42:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,888 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 18:42:03,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463151137] [2020-08-18 18:42:03,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121143419] [2020-08-18 18:42:03,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,890 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-18 18:42:03,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,908 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-18 18:42:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,908 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,910 INFO L225 Difference]: With dead ends: 240 [2020-08-18 18:42:03,910 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 18:42:03,911 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 18:42:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 18:42:03,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-18 18:42:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-18 18:42:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-18 18:42:03,925 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-18 18:42:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,925 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-18 18:42:03,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-18 18:42:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:03,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:03,927 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 18:42:03,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:42:03,928 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:03,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-18 18:42:03,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:03,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062209693] [2020-08-18 18:42:03,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:42:03,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062209693] [2020-08-18 18:42:03,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:03,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:03,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988790229] [2020-08-18 18:42:03,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:03,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:03,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:03,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:03,957 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-18 18:42:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:03,978 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-18 18:42:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:03,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:03,981 INFO L225 Difference]: With dead ends: 284 [2020-08-18 18:42:03,981 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 18:42:03,982 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 18:42:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 18:42:03,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-18 18:42:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-18 18:42:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-18 18:42:03,997 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-18 18:42:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:03,997 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-18 18:42:03,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-18 18:42:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:42:04,002 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,003 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 18:42:04,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:42:04,003 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-18 18:42:04,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172696127] [2020-08-18 18:42:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,039 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 18:42:04,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172696127] [2020-08-18 18:42:04,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662895536] [2020-08-18 18:42:04,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,042 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-18 18:42:04,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,071 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-18 18:42:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-18 18:42:04,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,074 INFO L225 Difference]: With dead ends: 524 [2020-08-18 18:42:04,074 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 18:42:04,075 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 18:42:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 18:42:04,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-18 18:42:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-18 18:42:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-18 18:42:04,092 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-18 18:42:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,093 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-18 18:42:04,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,093 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-18 18:42:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:04,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,095 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 18:42:04,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:42:04,096 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,096 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-18 18:42:04,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273646433] [2020-08-18 18:42:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,118 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 18:42:04,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273646433] [2020-08-18 18:42:04,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042952569] [2020-08-18 18:42:04,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,120 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-18 18:42:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,141 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-18 18:42:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,144 INFO L225 Difference]: With dead ends: 456 [2020-08-18 18:42:04,144 INFO L226 Difference]: Without dead ends: 314 [2020-08-18 18:42:04,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-18 18:42:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-18 18:42:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-18 18:42:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-18 18:42:04,158 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-18 18:42:04,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,159 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-18 18:42:04,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-18 18:42:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:04,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,161 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 18:42:04,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:42:04,161 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,162 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-18 18:42:04,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31371305] [2020-08-18 18:42:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,183 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 18:42:04,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31371305] [2020-08-18 18:42:04,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884484681] [2020-08-18 18:42:04,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,186 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-18 18:42:04,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,207 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-18 18:42:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:04,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,211 INFO L225 Difference]: With dead ends: 524 [2020-08-18 18:42:04,211 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 18:42:04,212 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 18:42:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 18:42:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-18 18:42:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-18 18:42:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-18 18:42:04,228 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-18 18:42:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,228 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-18 18:42:04,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-18 18:42:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:42:04,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,230 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 18:42:04,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 18:42:04,231 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-18 18:42:04,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841256213] [2020-08-18 18:42:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,262 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 18:42:04,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841256213] [2020-08-18 18:42:04,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238153016] [2020-08-18 18:42:04,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,265 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-18 18:42:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,291 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-18 18:42:04,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-18 18:42:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,295 INFO L225 Difference]: With dead ends: 1020 [2020-08-18 18:42:04,296 INFO L226 Difference]: Without dead ends: 586 [2020-08-18 18:42:04,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-18 18:42:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-18 18:42:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-18 18:42:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-18 18:42:04,322 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-18 18:42:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,322 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-18 18:42:04,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-18 18:42:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:04,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,325 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 18:42:04,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 18:42:04,326 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-18 18:42:04,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917147090] [2020-08-18 18:42:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,374 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 18:42:04,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917147090] [2020-08-18 18:42:04,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196606959] [2020-08-18 18:42:04,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,377 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-18 18:42:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,406 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-18 18:42:04,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,410 INFO L225 Difference]: With dead ends: 876 [2020-08-18 18:42:04,410 INFO L226 Difference]: Without dead ends: 602 [2020-08-18 18:42:04,411 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 18:42:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-18 18:42:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-18 18:42:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-18 18:42:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-18 18:42:04,432 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-18 18:42:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,433 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-18 18:42:04,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-18 18:42:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:04,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,435 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 18:42:04,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 18:42:04,435 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-18 18:42:04,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85266143] [2020-08-18 18:42:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,480 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 18:42:04,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85266143] [2020-08-18 18:42:04,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975179173] [2020-08-18 18:42:04,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,483 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-18 18:42:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,515 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-18 18:42:04,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,521 INFO L225 Difference]: With dead ends: 970 [2020-08-18 18:42:04,521 INFO L226 Difference]: Without dead ends: 968 [2020-08-18 18:42:04,522 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 18:42:04,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-18 18:42:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-18 18:42:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-18 18:42:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-18 18:42:04,558 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-18 18:42:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,558 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-18 18:42:04,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-18 18:42:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:42:04,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:42:04,560 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 18:42:04,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 18:42:04,561 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:42:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:42:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-18 18:42:04,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:42:04,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481602092] [2020-08-18 18:42:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:42:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:42:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:42:04,599 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 18:42:04,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481602092] [2020-08-18 18:42:04,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:42:04,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:42:04,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138143983] [2020-08-18 18:42:04,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:42:04,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:42:04,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:42:04,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:42:04,601 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-18 18:42:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:42:04,686 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-18 18:42:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:42:04,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 18:42:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:42:04,687 INFO L225 Difference]: With dead ends: 1992 [2020-08-18 18:42:04,687 INFO L226 Difference]: Without dead ends: 0 [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 18:42:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:42:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:42:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:42:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:42:04,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-18 18:42:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:42:04,691 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:42:04,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:42:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:42:04,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:42:04,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 18:42:04,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:42:04,719 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:42:04,720 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:04,720 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:42:04,720 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:42:04,720 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:42:04,720 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:42:04,720 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-18 18:42:04,720 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-18 18:42:04,720 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-18 18:42:04,721 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,722 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-18 18:42:04,722 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-18 18:42:04,722 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-18 18:42:04,722 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,722 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-18 18:42:04,722 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-18 18:42:04,723 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-18 18:42:04,723 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-18 18:42:04,723 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,723 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,723 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,723 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-18 18:42:04,723 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,724 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-18 18:42:04,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:42:04 BoogieIcfgContainer [2020-08-18 18:42:04,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:42:04,749 INFO L168 Benchmark]: Toolchain (without parser) took 2946.79 ms. Allocated memory was 141.0 MB in the beginning and 244.8 MB in the end (delta: 103.8 MB). Free memory was 104.2 MB in the beginning and 209.6 MB in the end (delta: -105.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:42:04,756 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 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 18:42:04,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.83 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:04,757 INFO L168 Benchmark]: Boogie Preprocessor took 111.67 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.4 MB in the beginning and 181.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:04,758 INFO L168 Benchmark]: RCFGBuilder took 303.73 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 165.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:42:04,758 INFO L168 Benchmark]: TraceAbstraction took 2153.89 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 164.7 MB in the beginning and 209.6 MB in the end (delta: -44.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:42:04,766 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 122.6 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 371.83 ms. Allocated memory is still 141.0 MB. Free memory was 104.0 MB in the beginning and 93.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.67 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 93.4 MB in the beginning and 181.4 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.73 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 165.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2153.89 ms. Allocated memory was 202.9 MB in the beginning and 244.8 MB in the end (delta: 41.9 MB). Free memory was 164.7 MB in the beginning and 209.6 MB in the end (delta: -44.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 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, 0.4s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 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...