/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:32:33,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:32:33,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:32:33,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:32:33,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:32:33,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:32:33,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:32:33,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:32:33,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:32:33,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:32:33,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:32:33,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:32:33,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:32:33,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:32:33,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:32:33,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:32:33,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:32:33,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:32:33,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:32:33,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:32:33,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:32:33,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:32:33,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:32:33,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:32:33,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:32:33,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:32:33,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:32:33,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:32:33,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:32:33,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 16:32:33,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:32:33,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:32:33,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:32:33,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:32:33,922 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:32:33,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:32:33,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:32:33,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:32:33,924 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:32:33,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:32:33,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:32:33,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:32:33,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:32:33,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:32:33,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:32:33,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:32:33,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:32:33,927 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:32:33,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:32:33,928 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:32:33,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:32:33,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:32:33,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:32:33,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:32:33,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:32:33,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:32:33,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:32:33,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:32:33,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:32:33,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:32:33,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:32:33,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:32:33,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:32:33,930 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:32:34,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:32:34,247 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:32:34,252 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:32:34,254 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:32:34,254 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:32:34,255 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 16:32:34,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fa5f9857/00106a21a78847deb0a00e57e1211f7f/FLAG10d02edc4 [2020-08-21 16:32:34,758 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:32:34,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-21 16:32:34,766 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fa5f9857/00106a21a78847deb0a00e57e1211f7f/FLAG10d02edc4 [2020-08-21 16:32:35,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fa5f9857/00106a21a78847deb0a00e57e1211f7f [2020-08-21 16:32:35,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:32:35,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:32:35,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:32:35,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:32:35,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:32:35,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5d0024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35, skipping insertion in model container [2020-08-21 16:32:35,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:32:35,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:32:35,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:32:35,355 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:32:35,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:32:35,401 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:32:35,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35 WrapperNode [2020-08-21 16:32:35,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:32:35,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:32:35,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:32:35,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:32:35,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... [2020-08-21 16:32:35,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:32:35,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:32:35,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:32:35,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:32:35,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:32:35,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:32:35,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:32:35,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:32:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:32:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:32:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:32:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:32:35,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:32:35,853 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:32:35,853 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:32:35,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:32:35 BoogieIcfgContainer [2020-08-21 16:32:35,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:32:35,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:32:35,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:32:35,863 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:32:35,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:32:35" (1/3) ... [2020-08-21 16:32:35,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc2527a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:32:35, skipping insertion in model container [2020-08-21 16:32:35,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:35" (2/3) ... [2020-08-21 16:32:35,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc2527a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:32:35, skipping insertion in model container [2020-08-21 16:32:35,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:32:35" (3/3) ... [2020-08-21 16:32:35,867 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-21 16:32:35,887 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:32:35,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:32:35,932 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:32:35,968 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:32:35,968 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:32:35,969 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:32:35,969 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:32:35,969 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:32:35,969 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:32:35,969 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:32:35,969 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:32:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-21 16:32:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:32:35,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:35,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:35,995 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,000 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-21 16:32:36,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698844437] [2020-08-21 16:32:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:36,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698844437] [2020-08-21 16:32:36,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:36,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:36,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997573968] [2020-08-21 16:32:36,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:36,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,219 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-21 16:32:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:36,291 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-21 16:32:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:36,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 16:32:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:36,306 INFO L225 Difference]: With dead ends: 75 [2020-08-21 16:32:36,306 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 16:32:36,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 16:32:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-21 16:32:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 16:32:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-21 16:32:36,357 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-21 16:32:36,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:36,358 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-21 16:32:36,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-21 16:32:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:32:36,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:32:36,361 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:36,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-21 16:32:36,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351471453] [2020-08-21 16:32:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:36,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351471453] [2020-08-21 16:32:36,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:36,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:36,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022005525] [2020-08-21 16:32:36,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:36,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:36,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,453 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-21 16:32:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:36,488 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-21 16:32:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:36,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 16:32:36,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:36,490 INFO L225 Difference]: With dead ends: 97 [2020-08-21 16:32:36,490 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 16:32:36,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 16:32:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-21 16:32:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 16:32:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-21 16:32:36,502 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-21 16:32:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:36,502 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-21 16:32:36,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:36,503 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-21 16:32:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:36,504 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:32:36,505 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,505 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-21 16:32:36,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628925570] [2020-08-21 16:32:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:36,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:36,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628925570] [2020-08-21 16:32:36,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:36,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:36,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310072339] [2020-08-21 16:32:36,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:36,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,555 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-21 16:32:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:36,578 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-21 16:32:36,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:36,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:36,581 INFO L225 Difference]: With dead ends: 90 [2020-08-21 16:32:36,581 INFO L226 Difference]: Without dead ends: 63 [2020-08-21 16:32:36,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-21 16:32:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-21 16:32:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 16:32:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-21 16:32:36,592 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-21 16:32:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:36,593 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-21 16:32:36,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-21 16:32:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:36,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:32:36,595 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-21 16:32:36,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337901682] [2020-08-21 16:32:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:36,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337901682] [2020-08-21 16:32:36,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:36,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:36,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048571273] [2020-08-21 16:32:36,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:36,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:36,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,640 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-21 16:32:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:36,659 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-21 16:32:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:36,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:36,662 INFO L225 Difference]: With dead ends: 112 [2020-08-21 16:32:36,662 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 16:32:36,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 16:32:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-21 16:32:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-21 16:32:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-21 16:32:36,675 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-21 16:32:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:36,675 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-21 16:32:36,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-21 16:32:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:36,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:32:36,677 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-21 16:32:36,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342060036] [2020-08-21 16:32:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:36,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342060036] [2020-08-21 16:32:36,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:36,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:36,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903624586] [2020-08-21 16:32:36,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:36,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,730 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-21 16:32:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:36,768 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-21 16:32:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:36,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:36,770 INFO L225 Difference]: With dead ends: 184 [2020-08-21 16:32:36,770 INFO L226 Difference]: Without dead ends: 112 [2020-08-21 16:32:36,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-21 16:32:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-21 16:32:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-21 16:32:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-21 16:32:36,785 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-21 16:32:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:36,785 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-21 16:32:36,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:36,786 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-21 16:32:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:36,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:32:36,788 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,788 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-21 16:32:36,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726164276] [2020-08-21 16:32:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:36,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726164276] [2020-08-21 16:32:36,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:36,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:36,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492643812] [2020-08-21 16:32:36,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:36,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:36,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,828 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-21 16:32:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:36,847 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-21 16:32:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:36,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:36,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:36,849 INFO L225 Difference]: With dead ends: 165 [2020-08-21 16:32:36,849 INFO L226 Difference]: Without dead ends: 114 [2020-08-21 16:32:36,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-21 16:32:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-21 16:32:36,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-21 16:32:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-21 16:32:36,868 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-21 16:32:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:36,872 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-21 16:32:36,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-21 16:32:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:36,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:32:36,874 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-21 16:32:36,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:36,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159861761] [2020-08-21 16:32:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:36,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159861761] [2020-08-21 16:32:36,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:36,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:36,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651629405] [2020-08-21 16:32:36,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:36,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:36,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:36,949 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-21 16:32:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:36,967 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-21 16:32:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:36,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:36,970 INFO L225 Difference]: With dead ends: 204 [2020-08-21 16:32:36,970 INFO L226 Difference]: Without dead ends: 202 [2020-08-21 16:32:36,971 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 [2020-08-21 16:32:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-21 16:32:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-21 16:32:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-21 16:32:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-21 16:32:36,987 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-21 16:32:36,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:36,987 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-21 16:32:36,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-21 16:32:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:36,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:36,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:36,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:32:37,000 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-21 16:32:37,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137467232] [2020-08-21 16:32:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137467232] [2020-08-21 16:32:37,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318545183] [2020-08-21 16:32:37,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,035 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-21 16:32:37,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,054 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-21 16:32:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:37,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,056 INFO L225 Difference]: With dead ends: 352 [2020-08-21 16:32:37,056 INFO L226 Difference]: Without dead ends: 210 [2020-08-21 16:32:37,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-21 16:32:37,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-21 16:32:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-21 16:32:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-21 16:32:37,073 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-21 16:32:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,073 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-21 16:32:37,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-21 16:32:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:37,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:37,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:32:37,076 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-21 16:32:37,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473096725] [2020-08-21 16:32:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473096725] [2020-08-21 16:32:37,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102104869] [2020-08-21 16:32:37,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,120 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-21 16:32:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,140 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-21 16:32:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,142 INFO L225 Difference]: With dead ends: 312 [2020-08-21 16:32:37,142 INFO L226 Difference]: Without dead ends: 214 [2020-08-21 16:32:37,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-21 16:32:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-21 16:32:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-21 16:32:37,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-21 16:32:37,156 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-21 16:32:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,156 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-21 16:32:37,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,157 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-21 16:32:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:37,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:37,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:32:37,159 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,159 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-21 16:32:37,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180971722] [2020-08-21 16:32:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180971722] [2020-08-21 16:32:37,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676950305] [2020-08-21 16:32:37,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,189 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-21 16:32:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,208 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-21 16:32:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,211 INFO L225 Difference]: With dead ends: 380 [2020-08-21 16:32:37,211 INFO L226 Difference]: Without dead ends: 378 [2020-08-21 16:32:37,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-21 16:32:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-21 16:32:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-21 16:32:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-21 16:32:37,225 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-21 16:32:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,226 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-21 16:32:37,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-21 16:32:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:37,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:37,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:32:37,229 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-21 16:32:37,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349965865] [2020-08-21 16:32:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349965865] [2020-08-21 16:32:37,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045296673] [2020-08-21 16:32:37,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,272 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-21 16:32:37,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,300 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-21 16:32:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,303 INFO L225 Difference]: With dead ends: 684 [2020-08-21 16:32:37,303 INFO L226 Difference]: Without dead ends: 402 [2020-08-21 16:32:37,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-21 16:32:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-21 16:32:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-21 16:32:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-21 16:32:37,321 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-21 16:32:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,321 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-21 16:32:37,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-21 16:32:37,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:32:37,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,323 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] [2020-08-21 16:32:37,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:32:37,324 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-21 16:32:37,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305252057] [2020-08-21 16:32:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305252057] [2020-08-21 16:32:37,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643644367] [2020-08-21 16:32:37,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,352 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-21 16:32:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,372 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-21 16:32:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 16:32:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,375 INFO L225 Difference]: With dead ends: 600 [2020-08-21 16:32:37,376 INFO L226 Difference]: Without dead ends: 410 [2020-08-21 16:32:37,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-21 16:32:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-21 16:32:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-21 16:32:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-21 16:32:37,391 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-21 16:32:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,391 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-21 16:32:37,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-21 16:32:37,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:32:37,393 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,393 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] [2020-08-21 16:32:37,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:32:37,393 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-21 16:32:37,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433568625] [2020-08-21 16:32:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433568625] [2020-08-21 16:32:37,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6585612] [2020-08-21 16:32:37,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,427 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-21 16:32:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,458 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-21 16:32:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 16:32:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,463 INFO L225 Difference]: With dead ends: 716 [2020-08-21 16:32:37,463 INFO L226 Difference]: Without dead ends: 714 [2020-08-21 16:32:37,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-21 16:32:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-21 16:32:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 16:32:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-21 16:32:37,484 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-21 16:32:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,485 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-21 16:32:37,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-21 16:32:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 16:32:37,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,487 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] [2020-08-21 16:32:37,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:32:37,487 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-21 16:32:37,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375834575] [2020-08-21 16:32:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375834575] [2020-08-21 16:32:37,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821299529] [2020-08-21 16:32:37,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,529 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-21 16:32:37,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,556 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-21 16:32:37,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 16:32:37,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,561 INFO L225 Difference]: With dead ends: 1340 [2020-08-21 16:32:37,561 INFO L226 Difference]: Without dead ends: 778 [2020-08-21 16:32:37,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-21 16:32:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-21 16:32:37,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-21 16:32:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-21 16:32:37,587 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-21 16:32:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,587 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-21 16:32:37,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-21 16:32:37,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 16:32:37,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,589 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] [2020-08-21 16:32:37,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:32:37,589 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-21 16:32:37,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192040804] [2020-08-21 16:32:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192040804] [2020-08-21 16:32:37,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213060337] [2020-08-21 16:32:37,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,613 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-21 16:32:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,639 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-21 16:32:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 16:32:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,644 INFO L225 Difference]: With dead ends: 1164 [2020-08-21 16:32:37,644 INFO L226 Difference]: Without dead ends: 794 [2020-08-21 16:32:37,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-21 16:32:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-21 16:32:37,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-21 16:32:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-21 16:32:37,674 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-21 16:32:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,675 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-21 16:32:37,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-21 16:32:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 16:32:37,677 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,677 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] [2020-08-21 16:32:37,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:32:37,677 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-21 16:32:37,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490079726] [2020-08-21 16:32:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490079726] [2020-08-21 16:32:37,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638827505] [2020-08-21 16:32:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,702 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-21 16:32:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,737 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-21 16:32:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 16:32:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,744 INFO L225 Difference]: With dead ends: 1356 [2020-08-21 16:32:37,744 INFO L226 Difference]: Without dead ends: 1354 [2020-08-21 16:32:37,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-21 16:32:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-21 16:32:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-21 16:32:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-21 16:32:37,791 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-21 16:32:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,791 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-21 16:32:37,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-21 16:32:37,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 16:32:37,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,794 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] [2020-08-21 16:32:37,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 16:32:37,794 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-21 16:32:37,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771189918] [2020-08-21 16:32:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771189918] [2020-08-21 16:32:37,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653839402] [2020-08-21 16:32:37,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,818 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-21 16:32:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,859 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-21 16:32:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 16:32:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,866 INFO L225 Difference]: With dead ends: 2636 [2020-08-21 16:32:37,866 INFO L226 Difference]: Without dead ends: 1514 [2020-08-21 16:32:37,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-21 16:32:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-21 16:32:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-21 16:32:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-21 16:32:37,913 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-21 16:32:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:37,913 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-21 16:32:37,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-21 16:32:37,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 16:32:37,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:37,916 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] [2020-08-21 16:32:37,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 16:32:37,916 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-21 16:32:37,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:37,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505229416] [2020-08-21 16:32:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:37,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:37,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505229416] [2020-08-21 16:32:37,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:37,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:37,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905421403] [2020-08-21 16:32:37,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:37,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:37,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:37,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,937 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-21 16:32:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:37,973 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-21 16:32:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:37,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 16:32:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:37,980 INFO L225 Difference]: With dead ends: 2268 [2020-08-21 16:32:37,980 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 16:32:37,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 16:32:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-21 16:32:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-21 16:32:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-21 16:32:38,030 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-21 16:32:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,030 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-21 16:32:38,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-21 16:32:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 16:32:38,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,033 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] [2020-08-21 16:32:38,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 16:32:38,033 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-21 16:32:38,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662589836] [2020-08-21 16:32:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662589836] [2020-08-21 16:32:38,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660746141] [2020-08-21 16:32:38,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,055 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-21 16:32:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,118 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-21 16:32:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 16:32:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,131 INFO L225 Difference]: With dead ends: 2572 [2020-08-21 16:32:38,131 INFO L226 Difference]: Without dead ends: 2570 [2020-08-21 16:32:38,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-21 16:32:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-21 16:32:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-21 16:32:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-21 16:32:38,227 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-21 16:32:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,227 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-21 16:32:38,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-21 16:32:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 16:32:38,231 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,232 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] [2020-08-21 16:32:38,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 16:32:38,232 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,233 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-21 16:32:38,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970108428] [2020-08-21 16:32:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970108428] [2020-08-21 16:32:38,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594732621] [2020-08-21 16:32:38,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,260 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-21 16:32:38,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,374 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-21 16:32:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 16:32:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,390 INFO L225 Difference]: With dead ends: 5196 [2020-08-21 16:32:38,390 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 16:32:38,395 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 [2020-08-21 16:32:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 16:32:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-21 16:32:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-21 16:32:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-21 16:32:38,488 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-21 16:32:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,488 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-21 16:32:38,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-21 16:32:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:32:38,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:38,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 16:32:38,493 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,494 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-21 16:32:38,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959962336] [2020-08-21 16:32:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959962336] [2020-08-21 16:32:38,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477283885] [2020-08-21 16:32:38,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,513 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-21 16:32:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,570 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-21 16:32:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 16:32:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,584 INFO L225 Difference]: With dead ends: 4428 [2020-08-21 16:32:38,584 INFO L226 Difference]: Without dead ends: 3018 [2020-08-21 16:32:38,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-21 16:32:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-21 16:32:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 16:32:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-21 16:32:38,674 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-21 16:32:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,674 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-21 16:32:38,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-21 16:32:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:32:38,679 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,679 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] [2020-08-21 16:32:38,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 16:32:38,679 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,680 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-21 16:32:38,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357368049] [2020-08-21 16:32:38,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357368049] [2020-08-21 16:32:38,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192276351] [2020-08-21 16:32:38,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,703 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-21 16:32:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:38,835 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-21 16:32:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:38,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 16:32:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:38,847 INFO L225 Difference]: With dead ends: 8650 [2020-08-21 16:32:38,848 INFO L226 Difference]: Without dead ends: 3016 [2020-08-21 16:32:38,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-21 16:32:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-21 16:32:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-21 16:32:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-21 16:32:38,938 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-21 16:32:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:38,939 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-21 16:32:38,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-21 16:32:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:32:38,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:38,943 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, 1, 1, 1, 1] [2020-08-21 16:32:38,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 16:32:38,943 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-21 16:32:38,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:38,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768615229] [2020-08-21 16:32:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:38,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768615229] [2020-08-21 16:32:38,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:38,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:38,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814582286] [2020-08-21 16:32:38,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:38,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:38,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:38,968 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-21 16:32:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:39,010 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-21 16:32:39,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:39,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 16:32:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:39,011 INFO L225 Difference]: With dead ends: 3016 [2020-08-21 16:32:39,011 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:32:39,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:32:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:32:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:32:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:32:39,017 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 16:32:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:39,017 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:32:39,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:32:39,017 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:32:39,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 16:32:39,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:32:39,040 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 16:32:39,040 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:39,040 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:39,040 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:32:39,041 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:32:39,041 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:32:39,041 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-21 16:32:39,041 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-21 16:32:39,041 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,041 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-21 16:32:39,041 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,041 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-21 16:32:39,041 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,042 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,042 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-21 16:32:39,042 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-21 16:32:39,042 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-21 16:32:39,042 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-21 16:32:39,042 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-21 16:32:39,042 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,043 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-21 16:32:39,044 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-21 16:32:39,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:32:39 BoogieIcfgContainer [2020-08-21 16:32:39,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:32:39,058 INFO L168 Benchmark]: Toolchain (without parser) took 3907.43 ms. Allocated memory was 138.9 MB in the beginning and 297.3 MB in the end (delta: 158.3 MB). Free memory was 101.8 MB in the beginning and 197.8 MB in the end (delta: -96.0 MB). Peak memory consumption was 62.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:39,059 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-21 16:32:39,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.35 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:39,060 INFO L168 Benchmark]: Boogie Preprocessor took 113.79 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.0 MB in the beginning and 178.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:39,061 INFO L168 Benchmark]: RCFGBuilder took 341.13 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 160.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:39,061 INFO L168 Benchmark]: TraceAbstraction took 3196.62 ms. Allocated memory was 200.8 MB in the beginning and 297.3 MB in the end (delta: 96.5 MB). Free memory was 159.8 MB in the beginning and 197.8 MB in the end (delta: -38.0 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:39,064 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 251.35 ms. Allocated memory is still 138.9 MB. Free memory was 101.6 MB in the beginning and 91.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.79 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.0 MB in the beginning and 178.7 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 341.13 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 160.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3196.62 ms. Allocated memory was 200.8 MB in the beginning and 297.3 MB in the end (delta: 96.5 MB). Free memory was 159.8 MB in the beginning and 197.8 MB in the end (delta: -38.0 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...