/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:53:40,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:53:40,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:53:40,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:53:40,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:53:40,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:53:40,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:53:40,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:53:40,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:53:40,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:53:40,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:53:40,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:53:40,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:53:40,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:53:41,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:53:41,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:53:41,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:53:41,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:53:41,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:53:41,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:53:41,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:53:41,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:53:41,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:53:41,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:53:41,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:53:41,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:53:41,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:53:41,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:53:41,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:53:41,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:53:41,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:53:41,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:53:41,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:53:41,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:53:41,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:53:41,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:53:41,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:53:41,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:53:41,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:53:41,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:53:41,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:53:41,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:53:41,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:53:41,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:53:41,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:53:41,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:53:41,049 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:53:41,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:53:41,050 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:53:41,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:53:41,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:53:41,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:53:41,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:53:41,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:53:41,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:53:41,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:53:41,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:53:41,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:53:41,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:53:41,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:53:41,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:53:41,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:53:41,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:53:41,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:53:41,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:53:41,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:53:41,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:53:41,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:53:41,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:53:41,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:53:41,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:53:41,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:53:41,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:53:41,453 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:53:41,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:53:41,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:53:41,460 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:53:41,461 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 17:53:41,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f001fd95/1a554a5a33d5457d90e1a812fb7490c3/FLAG76d1f9ec6 [2020-08-18 17:53:42,040 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:53:42,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 17:53:42,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f001fd95/1a554a5a33d5457d90e1a812fb7490c3/FLAG76d1f9ec6 [2020-08-18 17:53:42,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6f001fd95/1a554a5a33d5457d90e1a812fb7490c3 [2020-08-18 17:53:42,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:53:42,413 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:53:42,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:42,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:53:42,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:53:42,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6ee0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42, skipping insertion in model container [2020-08-18 17:53:42,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:53:42,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:53:42,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:42,733 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:53:42,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:42,793 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:53:42,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42 WrapperNode [2020-08-18 17:53:42,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:42,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:53:42,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:53:42,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:53:42,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... [2020-08-18 17:53:42,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:53:42,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:53:42,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:53:42,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:53:42,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:53:42,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:53:42,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:53:42,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:53:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:53:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 17:53:42,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:53:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:53:42,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:53:43,341 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:53:43,341 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 17:53:43,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:43 BoogieIcfgContainer [2020-08-18 17:53:43,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:53:43,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:53:43,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:53:43,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:53:43,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:53:42" (1/3) ... [2020-08-18 17:53:43,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1e8592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:43, skipping insertion in model container [2020-08-18 17:53:43,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:42" (2/3) ... [2020-08-18 17:53:43,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1e8592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:43, skipping insertion in model container [2020-08-18 17:53:43,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:43" (3/3) ... [2020-08-18 17:53:43,366 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-18 17:53:43,390 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:53:43,400 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:53:43,422 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:53:43,446 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:53:43,446 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:53:43,446 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:53:43,446 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:53:43,447 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:53:43,447 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:53:43,447 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:53:43,447 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:53:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 17:53:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:43,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:43,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:43,474 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:43,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:43,479 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-18 17:53:43,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:43,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956953407] [2020-08-18 17:53:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:43,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956953407] [2020-08-18 17:53:43,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:43,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:43,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980403743] [2020-08-18 17:53:43,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:43,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:43,744 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-18 17:53:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:43,827 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-18 17:53:43,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:43,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:43,847 INFO L225 Difference]: With dead ends: 93 [2020-08-18 17:53:43,847 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 17:53:43,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 17:53:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-18 17:53:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 17:53:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-18 17:53:43,936 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-18 17:53:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:43,938 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-18 17:53:43,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-18 17:53:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 17:53:43,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:43,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:43,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:53:43,945 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:43,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-18 17:53:43,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:43,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351746335] [2020-08-18 17:53:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351746335] [2020-08-18 17:53:44,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965642645] [2020-08-18 17:53:44,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,108 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-18 17:53:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,166 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-18 17:53:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 17:53:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,172 INFO L225 Difference]: With dead ends: 127 [2020-08-18 17:53:44,173 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 17:53:44,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 17:53:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 17:53:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 17:53:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-18 17:53:44,197 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-18 17:53:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,197 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-18 17:53:44,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-18 17:53:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:53:44,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:53:44,200 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-18 17:53:44,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831884532] [2020-08-18 17:53:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831884532] [2020-08-18 17:53:44,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154568722] [2020-08-18 17:53:44,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,316 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-18 17:53:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,338 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-18 17:53:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:53:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,341 INFO L225 Difference]: With dead ends: 117 [2020-08-18 17:53:44,341 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 17:53:44,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 17:53:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-18 17:53:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 17:53:44,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-18 17:53:44,351 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-18 17:53:44,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,352 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-18 17:53:44,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-18 17:53:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:53:44,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:53:44,354 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-18 17:53:44,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790315037] [2020-08-18 17:53:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790315037] [2020-08-18 17:53:44,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233720435] [2020-08-18 17:53:44,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,398 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-18 17:53:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,418 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-18 17:53:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:53:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,420 INFO L225 Difference]: With dead ends: 148 [2020-08-18 17:53:44,421 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 17:53:44,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 17:53:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-18 17:53:44,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 17:53:44,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-18 17:53:44,433 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-18 17:53:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,434 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-18 17:53:44,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-18 17:53:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 17:53:44,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:53:44,437 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,437 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-18 17:53:44,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332591148] [2020-08-18 17:53:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332591148] [2020-08-18 17:53:44,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846222102] [2020-08-18 17:53:44,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,483 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-18 17:53:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,506 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-18 17:53:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 17:53:44,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,508 INFO L225 Difference]: With dead ends: 244 [2020-08-18 17:53:44,509 INFO L226 Difference]: Without dead ends: 148 [2020-08-18 17:53:44,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-18 17:53:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-18 17:53:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 17:53:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-18 17:53:44,530 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-18 17:53:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,531 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-18 17:53:44,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-18 17:53:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:53:44,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:53:44,536 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-18 17:53:44,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528425754] [2020-08-18 17:53:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528425754] [2020-08-18 17:53:44,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743335882] [2020-08-18 17:53:44,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,605 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-18 17:53:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,652 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-18 17:53:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,653 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:53:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,658 INFO L225 Difference]: With dead ends: 219 [2020-08-18 17:53:44,658 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 17:53:44,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 17:53:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-18 17:53:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-18 17:53:44,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-18 17:53:44,685 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-18 17:53:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,686 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-18 17:53:44,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,686 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-18 17:53:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:53:44,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,690 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:53:44,692 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-18 17:53:44,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774817872] [2020-08-18 17:53:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774817872] [2020-08-18 17:53:44,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372931277] [2020-08-18 17:53:44,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,758 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-18 17:53:44,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,777 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-18 17:53:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:53:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,780 INFO L225 Difference]: With dead ends: 276 [2020-08-18 17:53:44,780 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 17:53:44,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 17:53:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-18 17:53:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 17:53:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-18 17:53:44,794 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-18 17:53:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,794 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-18 17:53:44,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-18 17:53:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 17:53:44,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:53:44,797 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-18 17:53:44,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822820551] [2020-08-18 17:53:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822820551] [2020-08-18 17:53:44,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537750362] [2020-08-18 17:53:44,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,847 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-18 17:53:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,881 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-18 17:53:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 17:53:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,883 INFO L225 Difference]: With dead ends: 472 [2020-08-18 17:53:44,884 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 17:53:44,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 17:53:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-18 17:53:44,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-18 17:53:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-18 17:53:44,903 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-18 17:53:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,903 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-18 17:53:44,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-18 17:53:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:53:44,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:53:44,906 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-18 17:53:44,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134463284] [2020-08-18 17:53:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134463284] [2020-08-18 17:53:44,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918631651] [2020-08-18 17:53:44,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:44,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:44,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,934 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-18 17:53:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:44,952 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-18 17:53:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:44,953 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:53:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:44,955 INFO L225 Difference]: With dead ends: 420 [2020-08-18 17:53:44,955 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 17:53:44,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 17:53:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-18 17:53:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-18 17:53:44,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-18 17:53:44,968 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-18 17:53:44,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:44,969 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-18 17:53:44,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:44,969 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-18 17:53:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:53:44,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:44,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:44,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:53:44,971 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:44,972 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-18 17:53:44,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:44,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682673000] [2020-08-18 17:53:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:44,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682673000] [2020-08-18 17:53:44,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:44,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:44,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990856831] [2020-08-18 17:53:45,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,001 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-18 17:53:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,022 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-18 17:53:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:53:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,025 INFO L225 Difference]: With dead ends: 524 [2020-08-18 17:53:45,026 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 17:53:45,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 17:53:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-18 17:53:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 17:53:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-18 17:53:45,040 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-18 17:53:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,041 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-18 17:53:45,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-18 17:53:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 17:53:45,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:53:45,043 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-18 17:53:45,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077889258] [2020-08-18 17:53:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:45,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077889258] [2020-08-18 17:53:45,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:45,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528895985] [2020-08-18 17:53:45,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,070 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-18 17:53:45,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,095 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-18 17:53:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 17:53:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,099 INFO L225 Difference]: With dead ends: 924 [2020-08-18 17:53:45,099 INFO L226 Difference]: Without dead ends: 546 [2020-08-18 17:53:45,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-18 17:53:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-18 17:53:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-18 17:53:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-18 17:53:45,119 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-18 17:53:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,120 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-18 17:53:45,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-18 17:53:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:53:45,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:53:45,122 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-18 17:53:45,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518232902] [2020-08-18 17:53:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:45,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518232902] [2020-08-18 17:53:45,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:45,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559326101] [2020-08-18 17:53:45,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,151 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-18 17:53:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,171 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-18 17:53:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:53:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,176 INFO L225 Difference]: With dead ends: 816 [2020-08-18 17:53:45,176 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 17:53:45,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 17:53:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-18 17:53:45,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-18 17:53:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-18 17:53:45,195 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-18 17:53:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,196 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-18 17:53:45,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-18 17:53:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:53:45,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:53:45,198 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-18 17:53:45,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296473307] [2020-08-18 17:53:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:45,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296473307] [2020-08-18 17:53:45,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:45,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008932279] [2020-08-18 17:53:45,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,229 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-18 17:53:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,252 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-18 17:53:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:53:45,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,259 INFO L225 Difference]: With dead ends: 1004 [2020-08-18 17:53:45,259 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 17:53:45,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 17:53:45,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-18 17:53:45,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 17:53:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-18 17:53:45,289 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-18 17:53:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,289 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-18 17:53:45,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-18 17:53:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 17:53:45,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:53:45,292 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-18 17:53:45,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675506410] [2020-08-18 17:53:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:45,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675506410] [2020-08-18 17:53:45,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:45,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36050464] [2020-08-18 17:53:45,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,335 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-18 17:53:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,384 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-18 17:53:45,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 17:53:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,392 INFO L225 Difference]: With dead ends: 1820 [2020-08-18 17:53:45,392 INFO L226 Difference]: Without dead ends: 1066 [2020-08-18 17:53:45,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-18 17:53:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-18 17:53:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-18 17:53:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-18 17:53:45,457 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-18 17:53:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,458 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-18 17:53:45,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-18 17:53:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:53:45,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:53:45,462 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-18 17:53:45,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070792301] [2020-08-18 17:53:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:45,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070792301] [2020-08-18 17:53:45,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:45,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322442433] [2020-08-18 17:53:45,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,535 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-18 17:53:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,581 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-18 17:53:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 17:53:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,591 INFO L225 Difference]: With dead ends: 1596 [2020-08-18 17:53:45,591 INFO L226 Difference]: Without dead ends: 1082 [2020-08-18 17:53:45,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-18 17:53:45,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-18 17:53:45,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-18 17:53:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-18 17:53:45,644 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-18 17:53:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,646 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-18 17:53:45,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-18 17:53:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:53:45,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:53:45,649 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-18 17:53:45,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896489451] [2020-08-18 17:53:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:45,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896489451] [2020-08-18 17:53:45,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:45,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383933378] [2020-08-18 17:53:45,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,701 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-18 17:53:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,748 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-18 17:53:45,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,749 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 17:53:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,760 INFO L225 Difference]: With dead ends: 1932 [2020-08-18 17:53:45,760 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 17:53:45,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 17:53:45,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-18 17:53:45,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 17:53:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-18 17:53:45,816 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-18 17:53:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,816 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-18 17:53:45,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-18 17:53:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 17:53:45,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:53:45,821 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-18 17:53:45,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570376506] [2020-08-18 17:53:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:45,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570376506] [2020-08-18 17:53:45,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:45,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:45,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601948635] [2020-08-18 17:53:45,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:45,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:45,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:45,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,846 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-18 17:53:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:45,903 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-18 17:53:45,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:45,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 17:53:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:45,915 INFO L225 Difference]: With dead ends: 3596 [2020-08-18 17:53:45,916 INFO L226 Difference]: Without dead ends: 2090 [2020-08-18 17:53:45,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-18 17:53:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-18 17:53:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-18 17:53:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-18 17:53:45,987 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-18 17:53:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:45,988 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-18 17:53:45,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-18 17:53:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:53:45,991 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:45,991 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, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:45,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:53:45,992 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:45,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:45,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-18 17:53:45,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:45,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113201316] [2020-08-18 17:53:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113201316] [2020-08-18 17:53:46,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532594690] [2020-08-18 17:53:46,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,023 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-18 17:53:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,063 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-18 17:53:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 17:53:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,073 INFO L225 Difference]: With dead ends: 3132 [2020-08-18 17:53:46,074 INFO L226 Difference]: Without dead ends: 2122 [2020-08-18 17:53:46,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-18 17:53:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-18 17:53:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-18 17:53:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-18 17:53:46,138 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-18 17:53:46,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,139 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-18 17:53:46,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-18 17:53:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:53:46,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:53:46,142 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-18 17:53:46,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368691931] [2020-08-18 17:53:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368691931] [2020-08-18 17:53:46,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619495639] [2020-08-18 17:53:46,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,184 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-18 17:53:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,232 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-18 17:53:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 17:53:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,250 INFO L225 Difference]: With dead ends: 3724 [2020-08-18 17:53:46,250 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 17:53:46,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 17:53:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-18 17:53:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-18 17:53:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-18 17:53:46,332 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-18 17:53:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,333 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-18 17:53:46,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-18 17:53:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 17:53:46,338 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:53:46,338 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,339 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-18 17:53:46,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445653777] [2020-08-18 17:53:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445653777] [2020-08-18 17:53:46,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11296987] [2020-08-18 17:53:46,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,383 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-18 17:53:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,446 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-18 17:53:46,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 17:53:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,465 INFO L225 Difference]: With dead ends: 7116 [2020-08-18 17:53:46,465 INFO L226 Difference]: Without dead ends: 4106 [2020-08-18 17:53:46,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-18 17:53:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-18 17:53:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-18 17:53:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-18 17:53:46,583 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-18 17:53:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,584 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-18 17:53:46,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-18 17:53:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:53:46,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:53:46,592 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-18 17:53:46,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355105200] [2020-08-18 17:53:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355105200] [2020-08-18 17:53:46,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209565813] [2020-08-18 17:53:46,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,620 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-18 17:53:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,696 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-18 17:53:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 17:53:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,728 INFO L225 Difference]: With dead ends: 6156 [2020-08-18 17:53:46,728 INFO L226 Difference]: Without dead ends: 4170 [2020-08-18 17:53:46,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-18 17:53:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-18 17:53:46,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-18 17:53:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-18 17:53:46,844 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-18 17:53:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:46,844 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-18 17:53:46,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-18 17:53:46,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:53:46,849 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:46,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:46,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:53:46,850 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:46,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:46,850 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-18 17:53:46,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:46,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919659266] [2020-08-18 17:53:46,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:46,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919659266] [2020-08-18 17:53:46,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:46,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:46,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504266428] [2020-08-18 17:53:46,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:46,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:46,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:46,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:46,872 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-18 17:53:46,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:46,970 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-18 17:53:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:46,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 17:53:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:46,994 INFO L225 Difference]: With dead ends: 12108 [2020-08-18 17:53:46,995 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 17:53:47,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 17:53:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-18 17:53:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 17:53:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-18 17:53:47,311 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-18 17:53:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,311 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-18 17:53:47,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-18 17:53:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 17:53:47,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:53:47,322 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-18 17:53:47,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051910590] [2020-08-18 17:53:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051910590] [2020-08-18 17:53:47,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083142802] [2020-08-18 17:53:47,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,348 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-18 17:53:47,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,470 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-18 17:53:47,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 17:53:47,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,489 INFO L225 Difference]: With dead ends: 9100 [2020-08-18 17:53:47,489 INFO L226 Difference]: Without dead ends: 9098 [2020-08-18 17:53:47,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-18 17:53:47,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-18 17:53:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 17:53:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-18 17:53:47,688 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-18 17:53:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:47,688 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-18 17:53:47,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-18 17:53:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 17:53:47,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:47,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:47,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:53:47,698 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:47,699 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-18 17:53:47,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:47,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890313267] [2020-08-18 17:53:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:47,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890313267] [2020-08-18 17:53:47,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:47,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:47,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411050510] [2020-08-18 17:53:47,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:47,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:47,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:47,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,721 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-18 17:53:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:47,939 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-18 17:53:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:47,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 17:53:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:47,967 INFO L225 Difference]: With dead ends: 13708 [2020-08-18 17:53:47,967 INFO L226 Difference]: Without dead ends: 13706 [2020-08-18 17:53:47,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:47,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-18 17:53:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-18 17:53:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-18 17:53:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-18 17:53:48,203 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-18 17:53:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:48,204 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-18 17:53:48,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:48,204 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-18 17:53:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 17:53:48,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:48,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:48,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 17:53:48,224 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-18 17:53:48,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:48,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15338787] [2020-08-18 17:53:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:48,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15338787] [2020-08-18 17:53:48,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:48,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:48,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950050284] [2020-08-18 17:53:48,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:48,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:48,247 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-18 17:53:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:48,577 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-18 17:53:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:48,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 17:53:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:48,607 INFO L225 Difference]: With dead ends: 27788 [2020-08-18 17:53:48,607 INFO L226 Difference]: Without dead ends: 15754 [2020-08-18 17:53:48,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:48,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-18 17:53:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-18 17:53:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-18 17:53:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-18 17:53:48,950 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-18 17:53:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:48,950 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-18 17:53:48,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:48,951 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-18 17:53:48,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:53:48,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:48,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:48,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 17:53:48,969 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-18 17:53:48,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:48,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829819131] [2020-08-18 17:53:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:48,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:48,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829819131] [2020-08-18 17:53:49,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093276723] [2020-08-18 17:53:49,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,002 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-18 17:53:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:49,581 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-18 17:53:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:49,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 17:53:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:49,612 INFO L225 Difference]: With dead ends: 23820 [2020-08-18 17:53:49,612 INFO L226 Difference]: Without dead ends: 16138 [2020-08-18 17:53:49,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-18 17:53:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-18 17:53:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-18 17:53:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-18 17:53:49,894 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-18 17:53:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:49,895 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-18 17:53:49,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:49,895 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-18 17:53:49,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:53:49,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:49,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:49,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 17:53:49,913 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:49,914 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-18 17:53:49,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:49,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603030509] [2020-08-18 17:53:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:49,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603030509] [2020-08-18 17:53:49,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:49,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:49,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905887864] [2020-08-18 17:53:49,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:49,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:49,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:49,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:49,934 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-18 17:53:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:50,324 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-18 17:53:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:50,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 17:53:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:50,374 INFO L225 Difference]: With dead ends: 26636 [2020-08-18 17:53:50,374 INFO L226 Difference]: Without dead ends: 26634 [2020-08-18 17:53:50,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-18 17:53:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-18 17:53:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-18 17:53:50,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-18 17:53:50,848 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-18 17:53:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:50,848 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-18 17:53:50,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:50,848 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-18 17:53:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 17:53:50,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:50,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:50,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 17:53:50,881 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-18 17:53:50,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:50,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549655996] [2020-08-18 17:53:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:50,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549655996] [2020-08-18 17:53:50,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:50,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:50,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449540176] [2020-08-18 17:53:50,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:50,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:50,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:50,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:50,910 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-18 17:53:51,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:51,329 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-18 17:53:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:51,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 17:53:51,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:51,379 INFO L225 Difference]: With dead ends: 55308 [2020-08-18 17:53:51,379 INFO L226 Difference]: Without dead ends: 31242 [2020-08-18 17:53:51,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-18 17:53:52,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-18 17:53:52,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-18 17:53:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-18 17:53:52,214 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-18 17:53:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:52,214 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-18 17:53:52,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-18 17:53:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:53:52,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:52,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:52,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 17:53:52,244 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-18 17:53:52,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:52,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363464083] [2020-08-18 17:53:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:52,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363464083] [2020-08-18 17:53:52,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:52,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:52,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115062946] [2020-08-18 17:53:52,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:52,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:52,266 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-18 17:53:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:52,612 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-18 17:53:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:52,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 17:53:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:52,655 INFO L225 Difference]: With dead ends: 46860 [2020-08-18 17:53:52,655 INFO L226 Difference]: Without dead ends: 31754 [2020-08-18 17:53:52,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-18 17:53:53,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-18 17:53:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-18 17:53:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-18 17:53:54,009 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-18 17:53:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:54,009 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-18 17:53:54,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-18 17:53:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:53:54,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:54,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:54,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 17:53:54,055 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:54,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:54,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-18 17:53:54,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:54,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051821968] [2020-08-18 17:53:54,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:54,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:54,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051821968] [2020-08-18 17:53:54,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:54,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:54,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970527361] [2020-08-18 17:53:54,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:54,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:54,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:54,076 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-18 17:53:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:54,501 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-18 17:53:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:54,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 17:53:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:54,542 INFO L225 Difference]: With dead ends: 51210 [2020-08-18 17:53:54,542 INFO L226 Difference]: Without dead ends: 51208 [2020-08-18 17:53:54,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-18 17:53:55,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-18 17:53:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-18 17:53:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-18 17:53:55,328 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-18 17:53:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:55,328 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-18 17:53:55,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-18 17:53:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 17:53:55,362 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:55,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:55,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 17:53:55,362 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:55,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:55,363 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-18 17:53:55,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:55,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867621885] [2020-08-18 17:53:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:55,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:55,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867621885] [2020-08-18 17:53:55,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:55,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:53:55,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182679248] [2020-08-18 17:53:55,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:53:55,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:55,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:53:55,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:55,393 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-18 17:53:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:56,086 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-18 17:53:56,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:53:56,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 17:53:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:56,087 INFO L225 Difference]: With dead ends: 109576 [2020-08-18 17:53:56,087 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:53:56,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:53:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:53:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:53:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:53:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:53:56,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-18 17:53:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:56,468 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:53:56,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:53:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:53:56,468 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:53:56,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 17:53:56,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:53:56,500 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 17:53:56,500 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:56,500 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:56,500 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:53:56,500 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:53:56,500 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:53:56,501 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-18 17:53:56,501 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-18 17:53:56,501 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-18 17:53:56,501 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-18 17:53:56,501 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-18 17:53:56,501 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-18 17:53:56,501 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,501 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,502 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-18 17:53:56,503 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 17:53:56,504 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-18 17:53:56,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:53:56 BoogieIcfgContainer [2020-08-18 17:53:56,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:53:56,523 INFO L168 Benchmark]: Toolchain (without parser) took 14109.40 ms. Allocated memory was 140.5 MB in the beginning and 1.1 GB in the end (delta: 976.2 MB). Free memory was 103.5 MB in the beginning and 811.7 MB in the end (delta: -708.2 MB). Peak memory consumption was 268.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:56,529 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-18 17:53:56,529 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.81 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 92.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:56,532 INFO L168 Benchmark]: Boogie Preprocessor took 138.95 ms. Allocated memory was 140.5 MB in the beginning and 199.2 MB in the end (delta: 58.7 MB). Free memory was 92.0 MB in the beginning and 176.7 MB in the end (delta: -84.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:56,532 INFO L168 Benchmark]: RCFGBuilder took 411.63 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 156.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:56,532 INFO L168 Benchmark]: TraceAbstraction took 13163.04 ms. Allocated memory was 199.2 MB in the beginning and 1.1 GB in the end (delta: 917.5 MB). Free memory was 156.3 MB in the beginning and 811.7 MB in the end (delta: -655.5 MB). Peak memory consumption was 262.0 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:56,536 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 379.81 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 92.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.95 ms. Allocated memory was 140.5 MB in the beginning and 199.2 MB in the end (delta: 58.7 MB). Free memory was 92.0 MB in the beginning and 176.7 MB in the end (delta: -84.7 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.63 ms. Allocated memory is still 199.2 MB. Free memory was 176.7 MB in the beginning and 156.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13163.04 ms. Allocated memory was 199.2 MB in the beginning and 1.1 GB in the end (delta: 917.5 MB). Free memory was 156.3 MB in the beginning and 811.7 MB in the end (delta: -655.5 MB). Peak memory consumption was 262.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: 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: 42]: 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, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.0s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.5s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 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...