/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 06:17:15,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 06:17:15,147 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 06:17:15,188 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 06:17:15,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 06:17:15,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 06:17:15,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 06:17:15,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 06:17:15,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 06:17:15,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 06:17:15,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 06:17:15,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 06:17:15,208 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 06:17:15,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 06:17:15,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 06:17:15,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 06:17:15,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 06:17:15,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 06:17:15,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 06:17:15,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 06:17:15,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 06:17:15,218 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 06:17:15,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 06:17:15,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 06:17:15,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 06:17:15,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 06:17:15,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 06:17:15,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 06:17:15,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 06:17:15,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 06:17:15,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 06:17:15,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 06:17:15,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 06:17:15,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 06:17:15,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 06:17:15,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 06:17:15,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 06:17:15,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 06:17:15,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 06:17:15,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 06:17:15,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 06:17:15,232 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 [2020-08-22 06:17:15,255 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 06:17:15,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 06:17:15,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 06:17:15,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 06:17:15,257 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 06:17:15,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 06:17:15,257 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 06:17:15,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 06:17:15,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 06:17:15,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 06:17:15,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 06:17:15,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 06:17:15,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 06:17:15,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 06:17:15,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 06:17:15,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 06:17:15,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 06:17:15,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 06:17:15,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 06:17:15,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 06:17:15,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 06:17:15,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 06:17:15,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 06:17:15,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 06:17:15,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 06:17:15,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 06:17:15,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 06:17:15,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 06:17:15,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 06:17:15,262 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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-08-22 06:17:15,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 06:17:15,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 06:17:15,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 06:17:15,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 06:17:15,604 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 06:17:15,605 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 06:17:15,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d7b814d2/fdcd535900a54a3c82c9ad35b8800028/FLAGd97639463 [2020-08-22 06:17:16,153 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 06:17:16,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 06:17:16,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d7b814d2/fdcd535900a54a3c82c9ad35b8800028/FLAGd97639463 [2020-08-22 06:17:16,552 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d7b814d2/fdcd535900a54a3c82c9ad35b8800028 [2020-08-22 06:17:16,562 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 06:17:16,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 06:17:16,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 06:17:16,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 06:17:16,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 06:17:16,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7123c34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16, skipping insertion in model container [2020-08-22 06:17:16,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 06:17:16,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 06:17:16,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:17:16,836 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 06:17:16,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 06:17:16,872 INFO L208 MainTranslator]: Completed translation [2020-08-22 06:17:16,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16 WrapperNode [2020-08-22 06:17:16,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 06:17:16,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 06:17:16,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 06:17:16,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 06:17:16,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (1/1) ... [2020-08-22 06:17:16,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 06:17:16,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 06:17:16,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 06:17:16,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 06:17:16,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (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 [2020-08-22 06:17:17,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 06:17:17,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 06:17:17,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 06:17:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 06:17:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 06:17:17,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 06:17:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 06:17:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 06:17:17,340 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 06:17:17,340 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 06:17:17,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:17:17 BoogieIcfgContainer [2020-08-22 06:17:17,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 06:17:17,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 06:17:17,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 06:17:17,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 06:17:17,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:17:16" (1/3) ... [2020-08-22 06:17:17,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc2c8e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:17:17, skipping insertion in model container [2020-08-22 06:17:17,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:17:16" (2/3) ... [2020-08-22 06:17:17,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc2c8e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:17:17, skipping insertion in model container [2020-08-22 06:17:17,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:17:17" (3/3) ... [2020-08-22 06:17:17,356 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-22 06:17:17,370 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 06:17:17,382 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 06:17:17,401 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 06:17:17,432 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 06:17:17,432 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 06:17:17,432 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 06:17:17,433 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 06:17:17,433 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 06:17:17,433 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 06:17:17,434 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 06:17:17,434 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 06:17:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 06:17:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 06:17:17,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:17,469 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:17,469 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-22 06:17:17,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:17,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044317383] [2020-08-22 06:17:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:17,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:17,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044317383] [2020-08-22 06:17:17,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:17,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:17,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067736682] [2020-08-22 06:17:17,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:17,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:17,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:17,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:17,713 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 06:17:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:17,766 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-22 06:17:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:17,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 06:17:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:17,782 INFO L225 Difference]: With dead ends: 69 [2020-08-22 06:17:17,782 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 06:17:17,786 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 [2020-08-22 06:17:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 06:17:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-22 06:17:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 06:17:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-22 06:17:17,837 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-22 06:17:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:17,838 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-22 06:17:17,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-22 06:17:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 06:17:17,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:17,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:17,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 06:17:17,841 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-22 06:17:17,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:17,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749457104] [2020-08-22 06:17:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:17,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:17,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749457104] [2020-08-22 06:17:17,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:17,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:17,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956065336] [2020-08-22 06:17:17,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:17,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:17,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:17,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:17,908 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-22 06:17:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:17,945 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-22 06:17:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:17,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 06:17:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:17,948 INFO L225 Difference]: With dead ends: 87 [2020-08-22 06:17:17,948 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 06:17:17,949 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 [2020-08-22 06:17:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 06:17:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-22 06:17:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 06:17:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-22 06:17:17,961 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-22 06:17:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:17,961 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-22 06:17:17,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-22 06:17:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 06:17:17,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:17,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:17,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 06:17:17,964 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:17,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:17,964 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-22 06:17:17,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:17,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801031597] [2020-08-22 06:17:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801031597] [2020-08-22 06:17:18,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411568542] [2020-08-22 06:17:18,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,018 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-22 06:17:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,040 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-22 06:17:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 06:17:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,043 INFO L225 Difference]: With dead ends: 81 [2020-08-22 06:17:18,043 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 06:17:18,044 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 [2020-08-22 06:17:18,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 06:17:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-22 06:17:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 06:17:18,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-22 06:17:18,054 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-22 06:17:18,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,055 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-22 06:17:18,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,055 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-22 06:17:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 06:17:18,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:18,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 06:17:18,057 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-22 06:17:18,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315811744] [2020-08-22 06:17:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315811744] [2020-08-22 06:17:18,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340863318] [2020-08-22 06:17:18,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,130 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-22 06:17:18,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,154 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-22 06:17:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 06:17:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,157 INFO L225 Difference]: With dead ends: 100 [2020-08-22 06:17:18,157 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 06:17:18,158 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 [2020-08-22 06:17:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 06:17:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-22 06:17:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 06:17:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-22 06:17:18,175 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-22 06:17:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,177 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-22 06:17:18,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,177 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-22 06:17:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 06:17:18,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:18,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 06:17:18,181 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-22 06:17:18,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614900258] [2020-08-22 06:17:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614900258] [2020-08-22 06:17:18,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531491653] [2020-08-22 06:17:18,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,222 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-22 06:17:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,245 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-22 06:17:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,246 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 06:17:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,247 INFO L225 Difference]: With dead ends: 164 [2020-08-22 06:17:18,248 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 06:17:18,249 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 [2020-08-22 06:17:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 06:17:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-22 06:17:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 06:17:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-22 06:17:18,261 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-22 06:17:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,261 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-22 06:17:18,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-22 06:17:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 06:17:18,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:18,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 06:17:18,263 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-22 06:17:18,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930353347] [2020-08-22 06:17:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930353347] [2020-08-22 06:17:18,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150781195] [2020-08-22 06:17:18,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,317 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-22 06:17:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,357 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-22 06:17:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 06:17:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,363 INFO L225 Difference]: With dead ends: 147 [2020-08-22 06:17:18,363 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 06:17:18,364 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 [2020-08-22 06:17:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 06:17:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-22 06:17:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 06:17:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-22 06:17:18,389 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-22 06:17:18,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,390 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-22 06:17:18,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-22 06:17:18,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 06:17:18,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:18,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 06:17:18,394 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-22 06:17:18,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760137038] [2020-08-22 06:17:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760137038] [2020-08-22 06:17:18,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415612788] [2020-08-22 06:17:18,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,476 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-22 06:17:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,497 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-22 06:17:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,497 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 06:17:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,499 INFO L225 Difference]: With dead ends: 180 [2020-08-22 06:17:18,500 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 06:17:18,501 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 [2020-08-22 06:17:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 06:17:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-22 06:17:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 06:17:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-22 06:17:18,514 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-22 06:17:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,515 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-22 06:17:18,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-22 06:17:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 06:17:18,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:18,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 06:17:18,518 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-22 06:17:18,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591314510] [2020-08-22 06:17:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591314510] [2020-08-22 06:17:18,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253429189] [2020-08-22 06:17:18,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,564 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-22 06:17:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,585 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 06:17:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 06:17:18,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,588 INFO L225 Difference]: With dead ends: 312 [2020-08-22 06:17:18,588 INFO L226 Difference]: Without dead ends: 186 [2020-08-22 06:17:18,589 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 [2020-08-22 06:17:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-22 06:17:18,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-22 06:17:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 06:17:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-22 06:17:18,604 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-22 06:17:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,605 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-22 06:17:18,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-22 06:17:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:17:18,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,607 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] [2020-08-22 06:17:18,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 06:17:18,607 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-22 06:17:18,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788931067] [2020-08-22 06:17:18,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788931067] [2020-08-22 06:17:18,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835427836] [2020-08-22 06:17:18,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,637 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-22 06:17:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,656 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-22 06:17:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 06:17:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,658 INFO L225 Difference]: With dead ends: 276 [2020-08-22 06:17:18,659 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 06:17:18,660 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 [2020-08-22 06:17:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 06:17:18,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-22 06:17:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 06:17:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-22 06:17:18,680 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-22 06:17:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,680 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-22 06:17:18,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-22 06:17:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:17:18,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,684 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] [2020-08-22 06:17:18,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 06:17:18,687 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-22 06:17:18,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641785037] [2020-08-22 06:17:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641785037] [2020-08-22 06:17:18,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535994671] [2020-08-22 06:17:18,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,752 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-22 06:17:18,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,785 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-22 06:17:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 06:17:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,788 INFO L225 Difference]: With dead ends: 332 [2020-08-22 06:17:18,788 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 06:17:18,789 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 [2020-08-22 06:17:18,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 06:17:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-22 06:17:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 06:17:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-22 06:17:18,814 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-22 06:17:18,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,814 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-22 06:17:18,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-22 06:17:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 06:17:18,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,819 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] [2020-08-22 06:17:18,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 06:17:18,820 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-22 06:17:18,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271905329] [2020-08-22 06:17:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271905329] [2020-08-22 06:17:18,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676478388] [2020-08-22 06:17:18,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,872 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-22 06:17:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,899 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-22 06:17:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 06:17:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,902 INFO L225 Difference]: With dead ends: 604 [2020-08-22 06:17:18,903 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 06:17:18,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 06:17:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-22 06:17:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-22 06:17:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-22 06:17:18,920 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-22 06:17:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,920 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-22 06:17:18,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-22 06:17:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:18,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,923 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] [2020-08-22 06:17:18,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 06:17:18,923 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-22 06:17:18,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268254600] [2020-08-22 06:17:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:18,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268254600] [2020-08-22 06:17:18,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:18,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:18,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102547733] [2020-08-22 06:17:18,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:18,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:18,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:18,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:18,948 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-22 06:17:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:18,970 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-22 06:17:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:18,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:18,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:18,973 INFO L225 Difference]: With dead ends: 528 [2020-08-22 06:17:18,973 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 06:17:18,974 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 [2020-08-22 06:17:18,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 06:17:18,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-22 06:17:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 06:17:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-22 06:17:18,989 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-22 06:17:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:18,989 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-22 06:17:18,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-22 06:17:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:18,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:18,991 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] [2020-08-22 06:17:18,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 06:17:18,991 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-22 06:17:18,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:18,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887310988] [2020-08-22 06:17:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887310988] [2020-08-22 06:17:19,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93336927] [2020-08-22 06:17:19,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,021 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-22 06:17:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,043 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-22 06:17:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,048 INFO L225 Difference]: With dead ends: 620 [2020-08-22 06:17:19,048 INFO L226 Difference]: Without dead ends: 618 [2020-08-22 06:17:19,049 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 [2020-08-22 06:17:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-22 06:17:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-22 06:17:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-22 06:17:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-22 06:17:19,068 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-22 06:17:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,069 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-22 06:17:19,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-22 06:17:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 06:17:19,071 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,071 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] [2020-08-22 06:17:19,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 06:17:19,071 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-22 06:17:19,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917820115] [2020-08-22 06:17:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917820115] [2020-08-22 06:17:19,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588798956] [2020-08-22 06:17:19,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,101 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-22 06:17:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,127 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-22 06:17:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 06:17:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,131 INFO L225 Difference]: With dead ends: 1180 [2020-08-22 06:17:19,132 INFO L226 Difference]: Without dead ends: 682 [2020-08-22 06:17:19,133 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 [2020-08-22 06:17:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-22 06:17:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-22 06:17:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-22 06:17:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-22 06:17:19,156 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-22 06:17:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,156 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-22 06:17:19,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-22 06:17:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:19,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:19,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 06:17:19,159 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-22 06:17:19,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723932827] [2020-08-22 06:17:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723932827] [2020-08-22 06:17:19,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228117228] [2020-08-22 06:17:19,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,181 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-22 06:17:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,205 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-22 06:17:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,210 INFO L225 Difference]: With dead ends: 1020 [2020-08-22 06:17:19,210 INFO L226 Difference]: Without dead ends: 698 [2020-08-22 06:17:19,211 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 [2020-08-22 06:17:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-22 06:17:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-22 06:17:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-22 06:17:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-22 06:17:19,238 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-22 06:17:19,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,239 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-22 06:17:19,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-22 06:17:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:19,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:19,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 06:17:19,241 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,242 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-22 06:17:19,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044274801] [2020-08-22 06:17:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044274801] [2020-08-22 06:17:19,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443906342] [2020-08-22 06:17:19,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,284 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-22 06:17:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,320 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-22 06:17:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,326 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 06:17:19,327 INFO L226 Difference]: Without dead ends: 1162 [2020-08-22 06:17:19,328 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 [2020-08-22 06:17:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-22 06:17:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-22 06:17:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-22 06:17:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-22 06:17:19,368 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-22 06:17:19,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,369 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-22 06:17:19,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-22 06:17:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 06:17:19,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:19,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 06:17:19,372 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-22 06:17:19,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170709601] [2020-08-22 06:17:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170709601] [2020-08-22 06:17:19,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838157012] [2020-08-22 06:17:19,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,422 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-22 06:17:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,462 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-22 06:17:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 06:17:19,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,468 INFO L225 Difference]: With dead ends: 2316 [2020-08-22 06:17:19,469 INFO L226 Difference]: Without dead ends: 1322 [2020-08-22 06:17:19,472 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 [2020-08-22 06:17:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-22 06:17:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-22 06:17:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-22 06:17:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-22 06:17:19,514 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-22 06:17:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,515 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-22 06:17:19,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-22 06:17:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:19,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:19,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 06:17:19,519 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,519 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-22 06:17:19,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308793559] [2020-08-22 06:17:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308793559] [2020-08-22 06:17:19,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718578551] [2020-08-22 06:17:19,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,550 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-22 06:17:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,585 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-22 06:17:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,592 INFO L225 Difference]: With dead ends: 1980 [2020-08-22 06:17:19,592 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 06:17:19,594 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 [2020-08-22 06:17:19,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 06:17:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-22 06:17:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-22 06:17:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-22 06:17:19,638 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-22 06:17:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,640 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-22 06:17:19,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-22 06:17:19,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:19,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:19,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 06:17:19,643 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-22 06:17:19,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255399288] [2020-08-22 06:17:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255399288] [2020-08-22 06:17:19,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135784458] [2020-08-22 06:17:19,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,679 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-22 06:17:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,749 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-22 06:17:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,750 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,762 INFO L225 Difference]: With dead ends: 2186 [2020-08-22 06:17:19,763 INFO L226 Difference]: Without dead ends: 2184 [2020-08-22 06:17:19,764 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 [2020-08-22 06:17:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-22 06:17:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-22 06:17:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-22 06:17:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-22 06:17:19,847 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-22 06:17:19,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:19,848 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-22 06:17:19,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-22 06:17:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 06:17:19,853 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 06:17:19,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 06:17:19,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 06:17:19,853 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 06:17:19,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 06:17:19,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-22 06:17:19,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 06:17:19,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305331710] [2020-08-22 06:17:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 06:17:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 06:17:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 06:17:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 06:17:19,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305331710] [2020-08-22 06:17:19,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 06:17:19,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 06:17:19,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562808693] [2020-08-22 06:17:19,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 06:17:19,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 06:17:19,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 06:17:19,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 06:17:19,901 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-22 06:17:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 06:17:19,990 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-22 06:17:19,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 06:17:19,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 06:17:19,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 06:17:19,991 INFO L225 Difference]: With dead ends: 4552 [2020-08-22 06:17:19,991 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 06:17:19,998 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 [2020-08-22 06:17:19,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 06:17:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 06:17:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 06:17:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 06:17:20,000 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-22 06:17:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 06:17:20,000 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 06:17:20,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 06:17:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 06:17:20,000 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 06:17:20,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 06:17:20,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 06:17:20,031 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 06:17:20,032 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:17:20,032 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 06:17:20,032 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 06:17:20,032 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 06:17:20,032 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 06:17:20,032 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-22 06:17:20,032 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-22 06:17:20,034 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,034 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-22 06:17:20,034 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-22 06:17:20,034 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-22 06:17:20,035 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-22 06:17:20,035 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-22 06:17:20,035 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,035 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-22 06:17:20,035 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,035 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,035 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-22 06:17:20,036 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,036 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-22 06:17:20,036 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,036 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,036 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-22 06:17:20,036 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-22 06:17:20,038 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-22 06:17:20,038 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,038 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,038 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,038 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-22 06:17:20,038 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,038 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-22 06:17:20,039 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-22 06:17:20,039 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,039 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 06:17:20,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:17:20 BoogieIcfgContainer [2020-08-22 06:17:20,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 06:17:20,071 INFO L168 Benchmark]: Toolchain (without parser) took 3503.09 ms. Allocated memory was 140.5 MB in the beginning and 246.4 MB in the end (delta: 105.9 MB). Free memory was 103.7 MB in the beginning and 219.6 MB in the end (delta: -115.9 MB). Peak memory consumption was 114.0 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:20,079 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 06:17:20,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.39 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 93.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:20,081 INFO L168 Benchmark]: Boogie Preprocessor took 118.26 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:20,082 INFO L168 Benchmark]: RCFGBuilder took 354.97 ms. Allocated memory is still 203.4 MB. Free memory was 181.2 MB in the beginning and 164.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:20,083 INFO L168 Benchmark]: TraceAbstraction took 2716.33 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 164.0 MB in the beginning and 219.6 MB in the end (delta: -55.6 MB). Peak memory consumption was 111.4 MB. Max. memory is 7.1 GB. [2020-08-22 06:17:20,088 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 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.39 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 93.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.26 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.2 MB in the beginning and 181.2 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.97 ms. Allocated memory is still 203.4 MB. Free memory was 181.2 MB in the beginning and 164.6 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2716.33 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 164.0 MB in the beginning and 219.6 MB in the end (delta: -55.6 MB). Peak memory consumption was 111.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...