/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:51:26,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:51:26,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:51:26,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:51:26,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:51:26,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:51:26,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:51:26,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:51:26,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:51:26,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:51:26,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:51:26,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:51:26,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:51:26,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:51:26,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:51:26,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:51:26,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:51:26,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:51:26,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:51:26,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:51:26,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:51:26,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:51:26,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:51:26,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:51:26,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:51:26,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:51:26,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:51:26,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:51:26,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:51:26,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:51:26,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:51:26,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:51:26,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:51:26,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 03:51:26,922 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:51:26,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:51:26,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:51:26,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:51:26,926 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:51:26,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:51:26,926 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:51:26,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:51:26,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:51:26,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:51:26,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:51:26,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:51:26,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:51:26,930 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:51:26,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:51:26,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:51:26,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:51:26,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:51:26,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:51:26,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:51:26,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:51:26,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:51:26,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:51:26,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:51:26,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:51:26,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:51:26,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:51:26,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:51:26,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:51:26,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:51:27,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:51:27,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:51:27,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:51:27,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:51:27,231 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:51:27,232 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 03:51:27,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/404d772d9/ea785179d29a4c579d285fbd947dc039/FLAG4b32ac984 [2020-08-22 03:51:27,819 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:51:27,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_7.c [2020-08-22 03:51:27,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/404d772d9/ea785179d29a4c579d285fbd947dc039/FLAG4b32ac984 [2020-08-22 03:51:28,164 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/404d772d9/ea785179d29a4c579d285fbd947dc039 [2020-08-22 03:51:28,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:51:28,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:51:28,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:28,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:51:28,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:51:28,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50d596ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28, skipping insertion in model container [2020-08-22 03:51:28,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:51:28,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:51:28,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:28,397 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:51:28,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:28,527 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:51:28,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28 WrapperNode [2020-08-22 03:51:28,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:28,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:51:28,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:51:28,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:51:28,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... [2020-08-22 03:51:28,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:51:28,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:51:28,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:51:28,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:51:28,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:51:28,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:51:28,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:51:28,635 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:51:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:51:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:51:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:51:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:51:28,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:51:28,928 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:51:28,929 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 03:51:28,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:28 BoogieIcfgContainer [2020-08-22 03:51:28,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:51:28,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:51:28,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:51:28,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:51:28,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:51:28" (1/3) ... [2020-08-22 03:51:28,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26386bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:28, skipping insertion in model container [2020-08-22 03:51:28,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:28" (2/3) ... [2020-08-22 03:51:28,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26386bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:28, skipping insertion in model container [2020-08-22 03:51:28,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:28" (3/3) ... [2020-08-22 03:51:28,954 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-08-22 03:51:28,966 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:51:28,985 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:51:29,004 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:51:29,028 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:51:29,028 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:51:29,028 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:51:29,028 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:51:29,028 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:51:29,029 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:51:29,029 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:51:29,029 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:51:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-08-22 03:51:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:51:29,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,055 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-08-22 03:51:29,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132666603] [2020-08-22 03:51:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132666603] [2020-08-22 03:51:29,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046916203] [2020-08-22 03:51:29,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,285 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-08-22 03:51:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,340 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-08-22 03:51:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,343 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:51:29,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,354 INFO L225 Difference]: With dead ends: 69 [2020-08-22 03:51:29,354 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 03:51:29,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 03:51:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-08-22 03:51:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 03:51:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-08-22 03:51:29,400 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-08-22 03:51:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,401 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-08-22 03:51:29,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-08-22 03:51:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 03:51:29,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:51:29,403 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-08-22 03:51:29,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950604521] [2020-08-22 03:51:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950604521] [2020-08-22 03:51:29,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381089412] [2020-08-22 03:51:29,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,471 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-08-22 03:51:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,502 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-08-22 03:51:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-22 03:51:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,504 INFO L225 Difference]: With dead ends: 87 [2020-08-22 03:51:29,504 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 03:51:29,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 03:51:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-08-22 03:51:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 03:51:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-08-22 03:51:29,516 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-08-22 03:51:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,516 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-08-22 03:51:29,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-08-22 03:51:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:29,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:51:29,519 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-08-22 03:51:29,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91030432] [2020-08-22 03:51:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91030432] [2020-08-22 03:51:29,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029574035] [2020-08-22 03:51:29,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,572 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-08-22 03:51:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,592 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-08-22 03:51:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,595 INFO L225 Difference]: With dead ends: 81 [2020-08-22 03:51:29,595 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 03:51:29,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 03:51:29,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-08-22 03:51:29,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 03:51:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-08-22 03:51:29,606 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-08-22 03:51:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,607 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-08-22 03:51:29,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-08-22 03:51:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:29,608 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:51:29,609 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-08-22 03:51:29,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766403370] [2020-08-22 03:51:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766403370] [2020-08-22 03:51:29,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769628676] [2020-08-22 03:51:29,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,683 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-08-22 03:51:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,722 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-08-22 03:51:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,723 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,725 INFO L225 Difference]: With dead ends: 100 [2020-08-22 03:51:29,725 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 03:51:29,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 03:51:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-08-22 03:51:29,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 03:51:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-08-22 03:51:29,738 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-08-22 03:51:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,738 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-08-22 03:51:29,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-08-22 03:51:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:29,739 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:51:29,740 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-08-22 03:51:29,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282578536] [2020-08-22 03:51:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282578536] [2020-08-22 03:51:29,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855692921] [2020-08-22 03:51:29,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,780 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-08-22 03:51:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,802 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-08-22 03:51:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:29,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,804 INFO L225 Difference]: With dead ends: 164 [2020-08-22 03:51:29,804 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 03:51:29,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 03:51:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-08-22 03:51:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-08-22 03:51:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-08-22 03:51:29,823 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-08-22 03:51:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,823 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-08-22 03:51:29,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-08-22 03:51:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:29,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:51:29,826 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-08-22 03:51:29,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451331997] [2020-08-22 03:51:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451331997] [2020-08-22 03:51:29,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462102173] [2020-08-22 03:51:29,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,865 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-08-22 03:51:29,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,884 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-08-22 03:51:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:29,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,886 INFO L225 Difference]: With dead ends: 147 [2020-08-22 03:51:29,886 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 03:51:29,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 03:51:29,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-08-22 03:51:29,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 03:51:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-08-22 03:51:29,903 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-08-22 03:51:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,904 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-08-22 03:51:29,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,904 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-08-22 03:51:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:29,907 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:51:29,908 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-08-22 03:51:29,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274149563] [2020-08-22 03:51:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:29,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274149563] [2020-08-22 03:51:29,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:29,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:29,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226418743] [2020-08-22 03:51:29,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:29,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:29,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:29,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,949 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-08-22 03:51:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:29,969 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-08-22 03:51:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:29,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:29,972 INFO L225 Difference]: With dead ends: 180 [2020-08-22 03:51:29,972 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 03:51:29,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 03:51:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-08-22 03:51:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-22 03:51:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-08-22 03:51:29,996 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-08-22 03:51:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:29,996 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-08-22 03:51:29,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-08-22 03:51:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:29,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:29,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:29,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:51:29,998 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:29,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:29,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-08-22 03:51:29,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:29,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404067872] [2020-08-22 03:51:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404067872] [2020-08-22 03:51:30,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368498753] [2020-08-22 03:51:30,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,031 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-08-22 03:51:30,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,058 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 03:51:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:30,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,060 INFO L225 Difference]: With dead ends: 312 [2020-08-22 03:51:30,060 INFO L226 Difference]: Without dead ends: 186 [2020-08-22 03:51:30,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-08-22 03:51:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-08-22 03:51:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-22 03:51:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-08-22 03:51:30,077 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-08-22 03:51:30,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,078 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-08-22 03:51:30,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-08-22 03:51:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:30,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:51:30,080 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-08-22 03:51:30,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871864125] [2020-08-22 03:51:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871864125] [2020-08-22 03:51:30,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778453909] [2020-08-22 03:51:30,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,109 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-08-22 03:51:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,151 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-08-22 03:51:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,153 INFO L225 Difference]: With dead ends: 276 [2020-08-22 03:51:30,153 INFO L226 Difference]: Without dead ends: 190 [2020-08-22 03:51:30,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-08-22 03:51:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-08-22 03:51:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 03:51:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-08-22 03:51:30,167 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-08-22 03:51:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,168 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-08-22 03:51:30,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-08-22 03:51:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:30,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:51:30,170 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-08-22 03:51:30,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653521630] [2020-08-22 03:51:30,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653521630] [2020-08-22 03:51:30,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058568261] [2020-08-22 03:51:30,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,204 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-08-22 03:51:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,228 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-08-22 03:51:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,231 INFO L225 Difference]: With dead ends: 332 [2020-08-22 03:51:30,231 INFO L226 Difference]: Without dead ends: 330 [2020-08-22 03:51:30,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-08-22 03:51:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-08-22 03:51:30,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-08-22 03:51:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-08-22 03:51:30,247 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-08-22 03:51:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,247 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-08-22 03:51:30,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-08-22 03:51:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:30,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:51:30,251 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-08-22 03:51:30,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522595891] [2020-08-22 03:51:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522595891] [2020-08-22 03:51:30,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850423319] [2020-08-22 03:51:30,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,295 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-08-22 03:51:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,340 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-08-22 03:51:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,343 INFO L225 Difference]: With dead ends: 604 [2020-08-22 03:51:30,343 INFO L226 Difference]: Without dead ends: 354 [2020-08-22 03:51:30,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-08-22 03:51:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-08-22 03:51:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-22 03:51:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-08-22 03:51:30,360 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-08-22 03:51:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,360 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-08-22 03:51:30,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-08-22 03:51:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:30,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:51:30,364 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-08-22 03:51:30,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757532813] [2020-08-22 03:51:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757532813] [2020-08-22 03:51:30,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250196485] [2020-08-22 03:51:30,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,396 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-08-22 03:51:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,416 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-08-22 03:51:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,419 INFO L225 Difference]: With dead ends: 528 [2020-08-22 03:51:30,420 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 03:51:30,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 03:51:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-08-22 03:51:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-22 03:51:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-08-22 03:51:30,435 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-08-22 03:51:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,435 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-08-22 03:51:30,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-08-22 03:51:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:30,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:51:30,438 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-08-22 03:51:30,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116840304] [2020-08-22 03:51:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116840304] [2020-08-22 03:51:30,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182605929] [2020-08-22 03:51:30,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,479 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-08-22 03:51:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,505 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-08-22 03:51:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,510 INFO L225 Difference]: With dead ends: 620 [2020-08-22 03:51:30,510 INFO L226 Difference]: Without dead ends: 618 [2020-08-22 03:51:30,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-08-22 03:51:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-08-22 03:51:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-08-22 03:51:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-08-22 03:51:30,530 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-08-22 03:51:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,531 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-08-22 03:51:30,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-08-22 03:51:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:30,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:51:30,533 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-08-22 03:51:30,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380125345] [2020-08-22 03:51:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380125345] [2020-08-22 03:51:30,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067355347] [2020-08-22 03:51:30,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,559 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-08-22 03:51:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,587 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-08-22 03:51:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,591 INFO L225 Difference]: With dead ends: 1180 [2020-08-22 03:51:30,591 INFO L226 Difference]: Without dead ends: 682 [2020-08-22 03:51:30,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-08-22 03:51:30,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-08-22 03:51:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-22 03:51:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-08-22 03:51:30,616 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-08-22 03:51:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,617 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-08-22 03:51:30,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-08-22 03:51:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:30,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:51:30,619 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,620 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-08-22 03:51:30,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636358492] [2020-08-22 03:51:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636358492] [2020-08-22 03:51:30,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998069162] [2020-08-22 03:51:30,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,646 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-08-22 03:51:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,672 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-08-22 03:51:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,676 INFO L225 Difference]: With dead ends: 1020 [2020-08-22 03:51:30,676 INFO L226 Difference]: Without dead ends: 698 [2020-08-22 03:51:30,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-08-22 03:51:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-08-22 03:51:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-08-22 03:51:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-08-22 03:51:30,705 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-08-22 03:51:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,705 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-08-22 03:51:30,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-08-22 03:51:30,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:30,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:51:30,708 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,708 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-08-22 03:51:30,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807932902] [2020-08-22 03:51:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807932902] [2020-08-22 03:51:30,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159842475] [2020-08-22 03:51:30,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,745 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-08-22 03:51:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,779 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-08-22 03:51:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,780 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,786 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 03:51:30,786 INFO L226 Difference]: Without dead ends: 1162 [2020-08-22 03:51:30,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-08-22 03:51:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-08-22 03:51:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-08-22 03:51:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-08-22 03:51:30,831 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-08-22 03:51:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,832 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-08-22 03:51:30,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-08-22 03:51:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:30,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:51:30,835 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-08-22 03:51:30,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232614325] [2020-08-22 03:51:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232614325] [2020-08-22 03:51:30,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289089704] [2020-08-22 03:51:30,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,863 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-08-22 03:51:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:30,906 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-08-22 03:51:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:30,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:30,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:30,913 INFO L225 Difference]: With dead ends: 2316 [2020-08-22 03:51:30,913 INFO L226 Difference]: Without dead ends: 1322 [2020-08-22 03:51:30,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-08-22 03:51:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-08-22 03:51:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-08-22 03:51:30,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-08-22 03:51:30,958 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-08-22 03:51:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:30,958 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-08-22 03:51:30,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-08-22 03:51:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:30,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:51:30,961 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-08-22 03:51:30,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170915574] [2020-08-22 03:51:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170915574] [2020-08-22 03:51:30,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177007338] [2020-08-22 03:51:30,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,996 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-08-22 03:51:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,040 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-08-22 03:51:31,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:31,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,047 INFO L225 Difference]: With dead ends: 1980 [2020-08-22 03:51:31,047 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 03:51:31,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 03:51:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-08-22 03:51:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-08-22 03:51:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-08-22 03:51:31,095 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-08-22 03:51:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,097 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-08-22 03:51:31,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-08-22 03:51:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:31,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 03:51:31,101 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-08-22 03:51:31,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721929271] [2020-08-22 03:51:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721929271] [2020-08-22 03:51:31,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799687794] [2020-08-22 03:51:31,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,131 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-08-22 03:51:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,194 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-08-22 03:51:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,206 INFO L225 Difference]: With dead ends: 2186 [2020-08-22 03:51:31,206 INFO L226 Difference]: Without dead ends: 2184 [2020-08-22 03:51:31,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-08-22 03:51:31,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-08-22 03:51:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-08-22 03:51:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-08-22 03:51:31,301 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-08-22 03:51:31,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,301 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-08-22 03:51:31,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-08-22 03:51:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:31,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 03:51:31,306 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-08-22 03:51:31,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502869074] [2020-08-22 03:51:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502869074] [2020-08-22 03:51:31,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031108868] [2020-08-22 03:51:31,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,363 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-08-22 03:51:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,476 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-08-22 03:51:31,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:31,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,477 INFO L225 Difference]: With dead ends: 4552 [2020-08-22 03:51:31,477 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:51:31,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:51:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:51:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:51:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:51:31,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-08-22 03:51:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,487 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:51:31,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:51:31,488 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:51:31,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 03:51:31,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:51:31,518 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:51:31,519 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:31,519 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:31,520 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:51:31,520 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:51:31,520 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:51:31,520 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-08-22 03:51:31,520 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-08-22 03:51:31,520 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,520 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-08-22 03:51:31,520 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-08-22 03:51:31,521 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-08-22 03:51:31,521 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-08-22 03:51:31,521 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-08-22 03:51:31,521 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,521 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-08-22 03:51:31,521 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,522 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,522 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-08-22 03:51:31,522 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,522 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-08-22 03:51:31,522 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,522 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,522 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-08-22 03:51:31,523 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-08-22 03:51:31,524 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-08-22 03:51:31,524 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,524 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,525 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,525 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-08-22 03:51:31,525 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,525 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-08-22 03:51:31,525 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-08-22 03:51:31,525 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,525 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-08-22 03:51:31,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:51:31 BoogieIcfgContainer [2020-08-22 03:51:31,543 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:51:31,547 INFO L168 Benchmark]: Toolchain (without parser) took 3370.57 ms. Allocated memory was 141.0 MB in the beginning and 243.8 MB in the end (delta: 102.8 MB). Free memory was 104.0 MB in the beginning and 196.0 MB in the end (delta: -92.0 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:31,554 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 03:51:31,557 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.81 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.8 MB in the beginning and 182.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:31,558 INFO L168 Benchmark]: Boogie Preprocessor took 33.03 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 180.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:31,559 INFO L168 Benchmark]: RCFGBuilder took 370.77 ms. Allocated memory is still 203.4 MB. Free memory was 180.3 MB in the beginning and 163.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:31,559 INFO L168 Benchmark]: TraceAbstraction took 2599.81 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 163.3 MB in the beginning and 196.0 MB in the end (delta: -32.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:31,565 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 353.81 ms. Allocated memory was 141.0 MB in the beginning and 203.4 MB in the end (delta: 62.4 MB). Free memory was 103.8 MB in the beginning and 182.2 MB in the end (delta: -78.4 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 33.03 ms. Allocated memory is still 203.4 MB. Free memory was 182.2 MB in the beginning and 180.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 370.77 ms. Allocated memory is still 203.4 MB. Free memory was 180.3 MB in the beginning and 163.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2599.81 ms. Allocated memory was 203.4 MB in the beginning and 243.8 MB in the end (delta: 40.4 MB). Free memory was 163.3 MB in the beginning and 196.0 MB in the end (delta: -32.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...