/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:09:07,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:09:07,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:09:07,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:09:07,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:09:07,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:09:07,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:09:07,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:09:07,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:09:07,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:09:07,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:09:07,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:09:07,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:09:07,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:09:07,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:09:07,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:09:07,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:09:07,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:09:07,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:09:07,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:09:07,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:09:07,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:09:07,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:09:07,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:09:07,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:09:07,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:09:07,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:09:07,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:09:07,287 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:09:07,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 18:09:07,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:09:07,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:09:07,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:09:07,295 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 [2020-08-21 18:09:07,317 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:09:07,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:09:07,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:09:07,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:09:07,319 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:09:07,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:09:07,319 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:09:07,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:09:07,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:09:07,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:09:07,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:09:07,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:09:07,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:09:07,320 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:09:07,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:09:07,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:09:07,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:09:07,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:09:07,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:09:07,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:09:07,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:09:07,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:09:07,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:09:07,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:09:07,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:09:07,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:09:07,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:09:07,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:09:07,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:09:07,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:09:07,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:09:07,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:09:07,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:09:07,669 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:09:07,671 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:09:07,672 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-21 18:09:07,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e43028f49/63ab2cba28a044d195b8a55884699127/FLAGb956e2511 [2020-08-21 18:09:08,227 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:09:08,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-21 18:09:08,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e43028f49/63ab2cba28a044d195b8a55884699127/FLAGb956e2511 [2020-08-21 18:09:08,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e43028f49/63ab2cba28a044d195b8a55884699127 [2020-08-21 18:09:08,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:09:08,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:09:08,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:08,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:09:08,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:09:08,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3699edcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08, skipping insertion in model container [2020-08-21 18:09:08,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:09:08,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:09:08,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:08,824 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:09:08,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:08,874 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:09:08,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08 WrapperNode [2020-08-21 18:09:08,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:08,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:09:08,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:09:08,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:09:08,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (1/1) ... [2020-08-21 18:09:08,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:09:08,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:09:08,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:09:08,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:09:08,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (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 [2020-08-21 18:09:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:09:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:09:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:09:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:09:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:09:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:09:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:09:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:09:09,304 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:09:09,305 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:09:09,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:09 BoogieIcfgContainer [2020-08-21 18:09:09,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:09:09,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:09:09,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:09:09,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:09:09,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:09:08" (1/3) ... [2020-08-21 18:09:09,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e027dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:09, skipping insertion in model container [2020-08-21 18:09:09,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:08" (2/3) ... [2020-08-21 18:09:09,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10e027dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:09, skipping insertion in model container [2020-08-21 18:09:09,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:09" (3/3) ... [2020-08-21 18:09:09,322 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-21 18:09:09,335 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:09:09,342 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:09:09,359 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:09:09,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:09:09,388 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:09:09,388 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:09:09,388 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:09:09,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:09:09,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:09:09,389 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:09:09,389 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:09:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-21 18:09:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:09:09,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:09,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:09,418 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:09,426 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-21 18:09:09,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:09,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144222818] [2020-08-21 18:09:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:09,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:09,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144222818] [2020-08-21 18:09:09,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:09,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:09,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113515653] [2020-08-21 18:09:09,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:09,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:09,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:09,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:09,673 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-21 18:09:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:09,729 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-21 18:09:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:09,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 18:09:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:09,749 INFO L225 Difference]: With dead ends: 63 [2020-08-21 18:09:09,751 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 18:09:09,760 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 [2020-08-21 18:09:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 18:09:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-21 18:09:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 18:09:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-21 18:09:09,805 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-21 18:09:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:09,806 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-21 18:09:09,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-21 18:09:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 18:09:09,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:09,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:09,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:09:09,808 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-21 18:09:09,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:09,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271552970] [2020-08-21 18:09:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:09,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:09,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271552970] [2020-08-21 18:09:09,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:09,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:09,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877504675] [2020-08-21 18:09:09,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:09,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:09,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:09,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:09,881 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-21 18:09:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:09,913 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-21 18:09:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:09,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 18:09:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:09,917 INFO L225 Difference]: With dead ends: 77 [2020-08-21 18:09:09,917 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 18:09:09,918 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 [2020-08-21 18:09:09,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 18:09:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-21 18:09:09,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 18:09:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-21 18:09:09,928 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-21 18:09:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:09,928 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-21 18:09:09,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-21 18:09:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 18:09:09,929 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:09,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:09,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:09:09,930 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:09,931 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-21 18:09:09,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:09,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884322719] [2020-08-21 18:09:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:09,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:09,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884322719] [2020-08-21 18:09:09,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:09,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:09,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493135543] [2020-08-21 18:09:09,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:09,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:09,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:09,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:09,980 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-21 18:09:10,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,003 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-21 18:09:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 18:09:10,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,005 INFO L225 Difference]: With dead ends: 72 [2020-08-21 18:09:10,005 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 18:09:10,006 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 [2020-08-21 18:09:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 18:09:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-21 18:09:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 18:09:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-21 18:09:10,016 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-21 18:09:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,016 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-21 18:09:10,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-21 18:09:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 18:09:10,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:09:10,018 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,019 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-21 18:09:10,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870525218] [2020-08-21 18:09:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870525218] [2020-08-21 18:09:10,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116304623] [2020-08-21 18:09:10,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,077 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-21 18:09:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,115 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-21 18:09:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 18:09:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,119 INFO L225 Difference]: With dead ends: 88 [2020-08-21 18:09:10,119 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 18:09:10,120 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 [2020-08-21 18:09:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 18:09:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-21 18:09:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 18:09:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-21 18:09:10,131 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-21 18:09:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,131 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-21 18:09:10,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-21 18:09:10,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 18:09:10,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:09:10,134 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,134 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-21 18:09:10,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306708694] [2020-08-21 18:09:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306708694] [2020-08-21 18:09:10,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095525726] [2020-08-21 18:09:10,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,192 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-21 18:09:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,212 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-21 18:09:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 18:09:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,214 INFO L225 Difference]: With dead ends: 144 [2020-08-21 18:09:10,215 INFO L226 Difference]: Without dead ends: 88 [2020-08-21 18:09:10,216 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 [2020-08-21 18:09:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-21 18:09:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-21 18:09:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-21 18:09:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-21 18:09:10,226 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-21 18:09:10,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,226 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-21 18:09:10,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-21 18:09:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 18:09:10,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:09:10,228 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-21 18:09:10,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622889247] [2020-08-21 18:09:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622889247] [2020-08-21 18:09:10,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008169185] [2020-08-21 18:09:10,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,267 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-21 18:09:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,285 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-21 18:09:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 18:09:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,288 INFO L225 Difference]: With dead ends: 129 [2020-08-21 18:09:10,288 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 18:09:10,289 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 [2020-08-21 18:09:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 18:09:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-21 18:09:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 18:09:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-21 18:09:10,300 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-21 18:09:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,300 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-21 18:09:10,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-21 18:09:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 18:09:10,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:09:10,302 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-21 18:09:10,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968901119] [2020-08-21 18:09:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968901119] [2020-08-21 18:09:10,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117628025] [2020-08-21 18:09:10,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,355 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-21 18:09:10,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,379 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-21 18:09:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 18:09:10,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,382 INFO L225 Difference]: With dead ends: 156 [2020-08-21 18:09:10,382 INFO L226 Difference]: Without dead ends: 154 [2020-08-21 18:09:10,383 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 [2020-08-21 18:09:10,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-21 18:09:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-21 18:09:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 18:09:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-21 18:09:10,397 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-21 18:09:10,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,398 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-21 18:09:10,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-21 18:09:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 18:09:10,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:09:10,400 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-21 18:09:10,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787172757] [2020-08-21 18:09:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787172757] [2020-08-21 18:09:10,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422336687] [2020-08-21 18:09:10,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,434 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-21 18:09:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,455 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-21 18:09:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 18:09:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,457 INFO L225 Difference]: With dead ends: 272 [2020-08-21 18:09:10,457 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 18:09:10,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 18:09:10,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-21 18:09:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-21 18:09:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-21 18:09:10,488 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-21 18:09:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,488 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-21 18:09:10,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-21 18:09:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:09:10,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:09:10,493 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-21 18:09:10,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278210032] [2020-08-21 18:09:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278210032] [2020-08-21 18:09:10,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264718287] [2020-08-21 18:09:10,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,554 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-21 18:09:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,578 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-21 18:09:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 18:09:10,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,580 INFO L225 Difference]: With dead ends: 240 [2020-08-21 18:09:10,580 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 18:09:10,581 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 [2020-08-21 18:09:10,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 18:09:10,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-21 18:09:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-21 18:09:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-21 18:09:10,593 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-21 18:09:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,594 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-21 18:09:10,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-21 18:09:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:09:10,595 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:09:10,596 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-21 18:09:10,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025065143] [2020-08-21 18:09:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025065143] [2020-08-21 18:09:10,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710124864] [2020-08-21 18:09:10,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,626 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-21 18:09:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,648 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-21 18:09:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 18:09:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,651 INFO L225 Difference]: With dead ends: 284 [2020-08-21 18:09:10,651 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 18:09:10,652 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 [2020-08-21 18:09:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 18:09:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-21 18:09:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 18:09:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-21 18:09:10,668 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-21 18:09:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,668 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-21 18:09:10,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-21 18:09:10,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:09:10,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:10,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:09:10,671 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-21 18:09:10,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934057821] [2020-08-21 18:09:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934057821] [2020-08-21 18:09:10,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488284048] [2020-08-21 18:09:10,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,696 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-21 18:09:10,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,719 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-21 18:09:10,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 18:09:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,721 INFO L225 Difference]: With dead ends: 524 [2020-08-21 18:09:10,722 INFO L226 Difference]: Without dead ends: 306 [2020-08-21 18:09:10,723 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 [2020-08-21 18:09:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-21 18:09:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-21 18:09:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 18:09:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-21 18:09:10,737 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-21 18:09:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,737 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-21 18:09:10,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-21 18:09:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:09:10,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,740 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] [2020-08-21 18:09:10,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:09:10,740 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-21 18:09:10,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938846042] [2020-08-21 18:09:10,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938846042] [2020-08-21 18:09:10,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969020118] [2020-08-21 18:09:10,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,765 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-21 18:09:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,784 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-21 18:09:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:09:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,787 INFO L225 Difference]: With dead ends: 456 [2020-08-21 18:09:10,787 INFO L226 Difference]: Without dead ends: 314 [2020-08-21 18:09:10,788 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 [2020-08-21 18:09:10,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-21 18:09:10,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-21 18:09:10,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-21 18:09:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-21 18:09:10,800 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-21 18:09:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,801 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-21 18:09:10,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-21 18:09:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:09:10,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,803 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] [2020-08-21 18:09:10,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:09:10,803 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,804 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-21 18:09:10,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953082399] [2020-08-21 18:09:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953082399] [2020-08-21 18:09:10,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503556963] [2020-08-21 18:09:10,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,827 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-21 18:09:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,847 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-21 18:09:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:09:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,851 INFO L225 Difference]: With dead ends: 524 [2020-08-21 18:09:10,851 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 18:09:10,852 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 [2020-08-21 18:09:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 18:09:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-21 18:09:10,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 18:09:10,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-21 18:09:10,868 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-21 18:09:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,869 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-21 18:09:10,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-21 18:09:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:09:10,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,871 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] [2020-08-21 18:09:10,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:09:10,871 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-21 18:09:10,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432072257] [2020-08-21 18:09:10,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432072257] [2020-08-21 18:09:10,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704272517] [2020-08-21 18:09:10,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,900 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-21 18:09:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:10,926 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-21 18:09:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:10,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:09:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:10,930 INFO L225 Difference]: With dead ends: 1020 [2020-08-21 18:09:10,930 INFO L226 Difference]: Without dead ends: 586 [2020-08-21 18:09:10,931 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 [2020-08-21 18:09:10,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-21 18:09:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-21 18:09:10,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 18:09:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-21 18:09:10,952 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-21 18:09:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:10,952 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-21 18:09:10,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-21 18:09:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:09:10,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:10,954 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] [2020-08-21 18:09:10,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:09:10,955 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-21 18:09:10,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:10,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934501443] [2020-08-21 18:09:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:10,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934501443] [2020-08-21 18:09:10,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:10,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:10,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429321435] [2020-08-21 18:09:10,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:10,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:10,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:10,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:10,978 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-21 18:09:11,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:11,001 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-21 18:09:11,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:11,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:09:11,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:11,004 INFO L225 Difference]: With dead ends: 876 [2020-08-21 18:09:11,005 INFO L226 Difference]: Without dead ends: 602 [2020-08-21 18:09:11,006 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 [2020-08-21 18:09:11,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-21 18:09:11,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-21 18:09:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-21 18:09:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-21 18:09:11,026 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-21 18:09:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:11,026 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-21 18:09:11,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-21 18:09:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:09:11,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:11,028 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] [2020-08-21 18:09:11,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:09:11,028 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:11,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:11,029 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-21 18:09:11,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:11,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70127885] [2020-08-21 18:09:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:11,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70127885] [2020-08-21 18:09:11,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:11,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:11,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012848146] [2020-08-21 18:09:11,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:11,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:11,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:11,051 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-21 18:09:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:11,081 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-21 18:09:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:11,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:09:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:11,086 INFO L225 Difference]: With dead ends: 970 [2020-08-21 18:09:11,086 INFO L226 Difference]: Without dead ends: 968 [2020-08-21 18:09:11,087 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 [2020-08-21 18:09:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-21 18:09:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-21 18:09:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-21 18:09:11,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-21 18:09:11,120 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-21 18:09:11,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:11,120 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-21 18:09:11,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-21 18:09:11,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:09:11,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:11,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:11,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:09:11,123 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-21 18:09:11,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:11,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348897375] [2020-08-21 18:09:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:11,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:09:11,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348897375] [2020-08-21 18:09:11,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:11,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:09:11,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194372398] [2020-08-21 18:09:11,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:09:11,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:09:11,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:09:11,152 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-21 18:09:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:11,193 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-21 18:09:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:09:11,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:09:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:11,194 INFO L225 Difference]: With dead ends: 1992 [2020-08-21 18:09:11,194 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:09:11,198 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 [2020-08-21 18:09:11,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:09:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:09:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:09:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:09:11,199 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-21 18:09:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:11,199 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:09:11,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:09:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:09:11,200 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:09:11,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:09:11,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:09:11,241 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:09:11,241 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:09:11,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:09:11,242 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:09:11,242 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:09:11,242 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:09:11,242 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-21 18:09:11,242 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-21 18:09:11,242 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,243 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-21 18:09:11,243 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-21 18:09:11,243 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-21 18:09:11,243 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,243 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,243 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,244 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-21 18:09:11,244 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-21 18:09:11,244 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,244 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-21 18:09:11,244 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-21 18:09:11,245 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-21 18:09:11,245 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,245 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-21 18:09:11,245 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-21 18:09:11,245 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-21 18:09:11,246 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-21 18:09:11,246 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,246 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,246 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,247 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-21 18:09:11,247 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,247 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 18:09:11,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:11 BoogieIcfgContainer [2020-08-21 18:09:11,269 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:09:11,280 INFO L168 Benchmark]: Toolchain (without parser) took 2657.00 ms. Allocated memory was 138.4 MB in the beginning and 232.8 MB in the end (delta: 94.4 MB). Free memory was 101.6 MB in the beginning and 78.7 MB in the end (delta: 22.9 MB). Peak memory consumption was 117.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:11,281 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:09:11,282 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.52 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 91.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:11,284 INFO L168 Benchmark]: Boogie Preprocessor took 110.54 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 179.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:11,285 INFO L168 Benchmark]: RCFGBuilder took 325.81 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:11,288 INFO L168 Benchmark]: TraceAbstraction took 1956.25 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 163.6 MB in the beginning and 78.7 MB in the end (delta: 84.8 MB). Peak memory consumption was 115.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:09:11,297 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.52 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 91.3 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.54 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.3 MB in the beginning and 179.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.81 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1956.25 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 163.6 MB in the beginning and 78.7 MB in the end (delta: 84.8 MB). Peak memory consumption was 115.8 MB. 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: 1.8s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.5s, 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, 0.1s 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, 0.1s 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...