/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:27:04,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:27:04,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:27:04,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:27:04,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:27:04,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:27:04,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:27:04,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:27:04,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:27:04,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:27:04,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:27:04,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:27:04,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:27:04,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:27:04,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:27:04,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:27:04,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:27:04,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:27:04,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:27:04,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:27:04,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:27:04,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:27:04,855 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:27:04,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:27:04,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 21:27:04,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 21:27:04,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 21:27:04,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 21:27:04,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 21:27:04,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 21:27:04,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:27:04,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:27:04,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:27:04,877 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 [2020-08-21 21:27:04,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:27:04,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:27:04,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:27:04,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:27:04,931 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:27:04,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:27:04,932 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:27:04,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:27:04,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:27:04,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:27:04,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:27:04,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:27:04,933 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:27:04,933 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:27:04,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:27:04,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:27:04,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:27:04,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:27:04,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:27:04,934 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:27:04,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:27:04,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:27:04,936 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:27:04,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:27:04,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:27:04,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:27:04,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:27:04,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:27:04,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:27:04,937 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=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:27:05,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:27:05,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:27:05,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:27:05,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:27:05,285 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:27:05,285 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-21 21:27:05,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e22d35739/0a0063d49d8d4d53977ded899e107045/FLAG9ed71732b [2020-08-21 21:27:05,996 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:27:06,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2020-08-21 21:27:06,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e22d35739/0a0063d49d8d4d53977ded899e107045/FLAG9ed71732b [2020-08-21 21:27:06,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e22d35739/0a0063d49d8d4d53977ded899e107045 [2020-08-21 21:27:06,267 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:27:06,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:27:06,272 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:27:06,272 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:27:06,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:27:06,277 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:27:06" (1/1) ... [2020-08-21 21:27:06,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548345a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:06, skipping insertion in model container [2020-08-21 21:27:06,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:27:06" (1/1) ... [2020-08-21 21:27:06,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:27:06,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:27:07,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:27:07,013 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:27:07,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:27:07,229 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:27:07,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07 WrapperNode [2020-08-21 21:27:07,230 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:27:07,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:27:07,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:27:07,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:27:07,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... [2020-08-21 21:27:07,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... [2020-08-21 21:27:07,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... [2020-08-21 21:27:07,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... [2020-08-21 21:27:07,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... [2020-08-21 21:27:07,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... [2020-08-21 21:27:07,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... [2020-08-21 21:27:07,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:27:07,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:27:07,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:27:07,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:27:07,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:27:07,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:27:07,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:27:07,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-21 21:27:07,500 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:27:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-21 21:27:07,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:27:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:27:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 21:27:07,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:27:07,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:27:07,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:27:09,212 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:27:09,212 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:27:09,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:27:09 BoogieIcfgContainer [2020-08-21 21:27:09,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:27:09,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:27:09,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:27:09,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:27:09,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:27:06" (1/3) ... [2020-08-21 21:27:09,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c82d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:27:09, skipping insertion in model container [2020-08-21 21:27:09,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:27:07" (2/3) ... [2020-08-21 21:27:09,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c82d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:27:09, skipping insertion in model container [2020-08-21 21:27:09,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:27:09" (3/3) ... [2020-08-21 21:27:09,230 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2020-08-21 21:27:09,242 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:27:09,253 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:27:09,269 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:27:09,308 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:27:09,309 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:27:09,309 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:27:09,309 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:27:09,309 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:27:09,310 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:27:09,310 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:27:09,310 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:27:09,347 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-21 21:27:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 21:27:09,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:09,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:09,366 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2020-08-21 21:27:09,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:09,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096631185] [2020-08-21 21:27:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:09,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:27:09,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096631185] [2020-08-21 21:27:09,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:27:09,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 21:27:09,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717966946] [2020-08-21 21:27:09,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:27:09,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:27:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:27:09,931 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-21 21:27:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:12,665 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2020-08-21 21:27:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:27:12,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-08-21 21:27:12,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:12,691 INFO L225 Difference]: With dead ends: 886 [2020-08-21 21:27:12,691 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 21:27:12,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:27:12,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 21:27:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2020-08-21 21:27:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-08-21 21:27:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2020-08-21 21:27:12,815 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 47 [2020-08-21 21:27:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:12,816 INFO L479 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2020-08-21 21:27:12,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:27:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2020-08-21 21:27:12,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-21 21:27:12,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:12,824 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:12,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:27:12,825 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:12,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:12,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2020-08-21 21:27:12,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:12,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295195571] [2020-08-21 21:27:12,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:12,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:12,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:27:13,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295195571] [2020-08-21 21:27:13,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:27:13,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:27:13,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371574552] [2020-08-21 21:27:13,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:27:13,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:13,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:27:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:27:13,080 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 8 states. [2020-08-21 21:27:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:15,148 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2020-08-21 21:27:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:27:15,148 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-08-21 21:27:15,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:15,155 INFO L225 Difference]: With dead ends: 1320 [2020-08-21 21:27:15,155 INFO L226 Difference]: Without dead ends: 768 [2020-08-21 21:27:15,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:27:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-08-21 21:27:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2020-08-21 21:27:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-08-21 21:27:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2020-08-21 21:27:15,197 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 121 [2020-08-21 21:27:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:15,198 INFO L479 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2020-08-21 21:27:15,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:27:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2020-08-21 21:27:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-08-21 21:27:15,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:15,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:15,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:27:15,202 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2020-08-21 21:27:15,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:15,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290963937] [2020-08-21 21:27:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:15,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:15,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:27:15,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290963937] [2020-08-21 21:27:15,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:27:15,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 21:27:15,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939106717] [2020-08-21 21:27:15,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:27:15,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:15,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:27:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:27:15,467 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 8 states. [2020-08-21 21:27:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:17,373 INFO L93 Difference]: Finished difference Result 1330 states and 1917 transitions. [2020-08-21 21:27:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:27:17,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 130 [2020-08-21 21:27:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:17,381 INFO L225 Difference]: With dead ends: 1330 [2020-08-21 21:27:17,381 INFO L226 Difference]: Without dead ends: 770 [2020-08-21 21:27:17,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:27:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2020-08-21 21:27:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 754. [2020-08-21 21:27:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 754 states. [2020-08-21 21:27:17,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1023 transitions. [2020-08-21 21:27:17,422 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1023 transitions. Word has length 130 [2020-08-21 21:27:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:17,423 INFO L479 AbstractCegarLoop]: Abstraction has 754 states and 1023 transitions. [2020-08-21 21:27:17,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:27:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1023 transitions. [2020-08-21 21:27:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-08-21 21:27:17,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:17,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:17,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:27:17,429 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:17,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:17,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1539058259, now seen corresponding path program 1 times [2020-08-21 21:27:17,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:17,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377040622] [2020-08-21 21:27:17,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:17,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:17,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:17,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 21:27:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 81 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-08-21 21:27:17,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377040622] [2020-08-21 21:27:17,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:17,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 21:27:17,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793303321] [2020-08-21 21:27:17,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:27:17,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:27:17,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:27:17,791 INFO L87 Difference]: Start difference. First operand 754 states and 1023 transitions. Second operand 5 states. [2020-08-21 21:27:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:19,553 INFO L93 Difference]: Finished difference Result 2246 states and 3090 transitions. [2020-08-21 21:27:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:27:19,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-08-21 21:27:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:19,572 INFO L225 Difference]: With dead ends: 2246 [2020-08-21 21:27:19,573 INFO L226 Difference]: Without dead ends: 1498 [2020-08-21 21:27:19,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:27:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-08-21 21:27:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1310. [2020-08-21 21:27:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1310 states. [2020-08-21 21:27:19,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1681 transitions. [2020-08-21 21:27:19,683 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1681 transitions. Word has length 214 [2020-08-21 21:27:19,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:19,684 INFO L479 AbstractCegarLoop]: Abstraction has 1310 states and 1681 transitions. [2020-08-21 21:27:19,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:27:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1681 transitions. [2020-08-21 21:27:19,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-08-21 21:27:19,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:19,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:19,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:27:19,693 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:19,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2020-08-21 21:27:19,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:19,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740962245] [2020-08-21 21:27:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:19,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:19,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:19,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 21:27:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:20,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-21 21:27:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 154 proven. 191 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 21:27:20,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740962245] [2020-08-21 21:27:20,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:20,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:27:20,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607878029] [2020-08-21 21:27:20,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:27:20,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:27:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:27:20,410 INFO L87 Difference]: Start difference. First operand 1310 states and 1681 transitions. Second operand 9 states. [2020-08-21 21:27:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:23,212 INFO L93 Difference]: Finished difference Result 3081 states and 3988 transitions. [2020-08-21 21:27:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 21:27:23,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 317 [2020-08-21 21:27:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:23,224 INFO L225 Difference]: With dead ends: 3081 [2020-08-21 21:27:23,225 INFO L226 Difference]: Without dead ends: 1734 [2020-08-21 21:27:23,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-21 21:27:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2020-08-21 21:27:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1690. [2020-08-21 21:27:23,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2020-08-21 21:27:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1966 transitions. [2020-08-21 21:27:23,293 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1966 transitions. Word has length 317 [2020-08-21 21:27:23,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:23,293 INFO L479 AbstractCegarLoop]: Abstraction has 1690 states and 1966 transitions. [2020-08-21 21:27:23,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:27:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1966 transitions. [2020-08-21 21:27:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-21 21:27:23,301 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:23,301 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:23,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:27:23,302 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:23,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1074149043, now seen corresponding path program 1 times [2020-08-21 21:27:23,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:23,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284736341] [2020-08-21 21:27:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:23,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:23,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:23,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-21 21:27:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:23,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2020-08-21 21:27:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 267 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-08-21 21:27:24,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284736341] [2020-08-21 21:27:24,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:24,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:27:24,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166880145] [2020-08-21 21:27:24,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:27:24,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:27:24,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:27:24,406 INFO L87 Difference]: Start difference. First operand 1690 states and 1966 transitions. Second operand 8 states. [2020-08-21 21:27:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:26,776 INFO L93 Difference]: Finished difference Result 3607 states and 4282 transitions. [2020-08-21 21:27:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:27:26,777 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-08-21 21:27:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:26,787 INFO L225 Difference]: With dead ends: 3607 [2020-08-21 21:27:26,787 INFO L226 Difference]: Without dead ends: 1923 [2020-08-21 21:27:26,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:27:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2020-08-21 21:27:26,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1882. [2020-08-21 21:27:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-21 21:27:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2178 transitions. [2020-08-21 21:27:26,854 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2178 transitions. Word has length 342 [2020-08-21 21:27:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:26,854 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2178 transitions. [2020-08-21 21:27:26,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:27:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2178 transitions. [2020-08-21 21:27:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-08-21 21:27:26,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:26,863 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:26,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:27:26,864 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:26,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1716498031, now seen corresponding path program 1 times [2020-08-21 21:27:26,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:26,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473255453] [2020-08-21 21:27:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:27,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:27,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:27,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-08-21 21:27:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:27,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2020-08-21 21:27:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 187 proven. 120 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-08-21 21:27:27,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473255453] [2020-08-21 21:27:27,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:27,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:27:27,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597563723] [2020-08-21 21:27:27,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:27:27,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:27:27,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:27:27,486 INFO L87 Difference]: Start difference. First operand 1882 states and 2178 transitions. Second operand 9 states. [2020-08-21 21:27:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:30,905 INFO L93 Difference]: Finished difference Result 5807 states and 7053 transitions. [2020-08-21 21:27:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:27:30,908 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 360 [2020-08-21 21:27:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:30,926 INFO L225 Difference]: With dead ends: 5807 [2020-08-21 21:27:30,926 INFO L226 Difference]: Without dead ends: 3550 [2020-08-21 21:27:30,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-08-21 21:27:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2020-08-21 21:27:31,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 3178. [2020-08-21 21:27:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-21 21:27:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3721 transitions. [2020-08-21 21:27:31,035 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3721 transitions. Word has length 360 [2020-08-21 21:27:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:31,036 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3721 transitions. [2020-08-21 21:27:31,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:27:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3721 transitions. [2020-08-21 21:27:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2020-08-21 21:27:31,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:31,057 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:31,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:27:31,057 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:31,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1968726846, now seen corresponding path program 1 times [2020-08-21 21:27:31,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:31,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565728617] [2020-08-21 21:27:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:31,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:31,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:31,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:31,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:31,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-21 21:27:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:31,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-21 21:27:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 516 proven. 79 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2020-08-21 21:27:31,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565728617] [2020-08-21 21:27:31,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:31,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:27:31,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373551864] [2020-08-21 21:27:31,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:27:31,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:27:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:27:31,707 INFO L87 Difference]: Start difference. First operand 3178 states and 3721 transitions. Second operand 7 states. [2020-08-21 21:27:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:33,337 INFO L93 Difference]: Finished difference Result 6928 states and 8232 transitions. [2020-08-21 21:27:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:27:33,338 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 609 [2020-08-21 21:27:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:33,356 INFO L225 Difference]: With dead ends: 6928 [2020-08-21 21:27:33,358 INFO L226 Difference]: Without dead ends: 3938 [2020-08-21 21:27:33,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:27:33,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2020-08-21 21:27:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3738. [2020-08-21 21:27:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3738 states. [2020-08-21 21:27:33,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 4393 transitions. [2020-08-21 21:27:33,463 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 4393 transitions. Word has length 609 [2020-08-21 21:27:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:33,466 INFO L479 AbstractCegarLoop]: Abstraction has 3738 states and 4393 transitions. [2020-08-21 21:27:33,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:27:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 4393 transitions. [2020-08-21 21:27:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-21 21:27:33,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:33,480 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:33,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:27:33,480 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1522525447, now seen corresponding path program 1 times [2020-08-21 21:27:33,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:33,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674249735] [2020-08-21 21:27:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:33,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:33,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:33,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:33,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:33,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 21:27:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:34,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 523 [2020-08-21 21:27:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 549 proven. 79 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2020-08-21 21:27:34,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674249735] [2020-08-21 21:27:34,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:34,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:27:34,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136558422] [2020-08-21 21:27:34,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:27:34,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:34,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:27:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:27:34,397 INFO L87 Difference]: Start difference. First operand 3738 states and 4393 transitions. Second operand 7 states. [2020-08-21 21:27:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:36,071 INFO L93 Difference]: Finished difference Result 8034 states and 9576 transitions. [2020-08-21 21:27:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:27:36,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 642 [2020-08-21 21:27:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:36,094 INFO L225 Difference]: With dead ends: 8034 [2020-08-21 21:27:36,094 INFO L226 Difference]: Without dead ends: 4484 [2020-08-21 21:27:36,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:27:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2020-08-21 21:27:36,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4472. [2020-08-21 21:27:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4472 states. [2020-08-21 21:27:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 5249 transitions. [2020-08-21 21:27:36,212 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 5249 transitions. Word has length 642 [2020-08-21 21:27:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:36,213 INFO L479 AbstractCegarLoop]: Abstraction has 4472 states and 5249 transitions. [2020-08-21 21:27:36,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:27:36,213 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 5249 transitions. [2020-08-21 21:27:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2020-08-21 21:27:36,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:36,231 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:36,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:27:36,231 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:36,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:36,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1863793902, now seen corresponding path program 1 times [2020-08-21 21:27:36,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:36,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385906969] [2020-08-21 21:27:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 311 [2020-08-21 21:27:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 441 [2020-08-21 21:27:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-21 21:27:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:36,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-21 21:27:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 622 proven. 298 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-08-21 21:27:37,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385906969] [2020-08-21 21:27:37,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:37,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:27:37,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452817812] [2020-08-21 21:27:37,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:27:37,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:37,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:27:37,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:27:37,864 INFO L87 Difference]: Start difference. First operand 4472 states and 5249 transitions. Second operand 7 states. [2020-08-21 21:27:39,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:39,765 INFO L93 Difference]: Finished difference Result 8817 states and 10383 transitions. [2020-08-21 21:27:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:27:39,766 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 779 [2020-08-21 21:27:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:39,784 INFO L225 Difference]: With dead ends: 8817 [2020-08-21 21:27:39,785 INFO L226 Difference]: Without dead ends: 4494 [2020-08-21 21:27:39,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:27:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2020-08-21 21:27:39,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4464. [2020-08-21 21:27:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4464 states. [2020-08-21 21:27:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4464 states to 4464 states and 5013 transitions. [2020-08-21 21:27:39,901 INFO L78 Accepts]: Start accepts. Automaton has 4464 states and 5013 transitions. Word has length 779 [2020-08-21 21:27:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:39,902 INFO L479 AbstractCegarLoop]: Abstraction has 4464 states and 5013 transitions. [2020-08-21 21:27:39,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:27:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4464 states and 5013 transitions. [2020-08-21 21:27:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2020-08-21 21:27:39,917 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:39,918 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:39,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:27:39,918 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:39,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1487204346, now seen corresponding path program 1 times [2020-08-21 21:27:39,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:39,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028949043] [2020-08-21 21:27:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:40,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:40,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:40,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:40,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:40,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 21:27:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:40,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 21:27:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:40,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-21 21:27:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1799 backedges. 754 proven. 79 refuted. 0 times theorem prover too weak. 966 trivial. 0 not checked. [2020-08-21 21:27:41,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028949043] [2020-08-21 21:27:41,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:41,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:27:41,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697402550] [2020-08-21 21:27:41,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:27:41,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:41,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:27:41,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:27:41,027 INFO L87 Difference]: Start difference. First operand 4464 states and 5013 transitions. Second operand 7 states. [2020-08-21 21:27:42,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:42,629 INFO L93 Difference]: Finished difference Result 9674 states and 10960 transitions. [2020-08-21 21:27:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:27:42,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 801 [2020-08-21 21:27:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:42,657 INFO L225 Difference]: With dead ends: 9674 [2020-08-21 21:27:42,657 INFO L226 Difference]: Without dead ends: 5398 [2020-08-21 21:27:42,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:27:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5398 states. [2020-08-21 21:27:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5398 to 5206. [2020-08-21 21:27:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-08-21 21:27:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 5890 transitions. [2020-08-21 21:27:42,776 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 5890 transitions. Word has length 801 [2020-08-21 21:27:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:42,778 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 5890 transitions. [2020-08-21 21:27:42,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:27:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 5890 transitions. [2020-08-21 21:27:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2020-08-21 21:27:42,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:42,796 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:42,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:27:42,796 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:42,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1595152538, now seen corresponding path program 1 times [2020-08-21 21:27:42,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:42,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213192051] [2020-08-21 21:27:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-21 21:27:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 467 [2020-08-21 21:27:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-21 21:27:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:43,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-21 21:27:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 648 proven. 298 refuted. 0 times theorem prover too weak. 1324 trivial. 0 not checked. [2020-08-21 21:27:44,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213192051] [2020-08-21 21:27:44,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:44,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:27:44,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596310341] [2020-08-21 21:27:44,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:27:44,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:27:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:27:44,301 INFO L87 Difference]: Start difference. First operand 5206 states and 5890 transitions. Second operand 9 states. [2020-08-21 21:27:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:47,116 INFO L93 Difference]: Finished difference Result 11142 states and 12646 transitions. [2020-08-21 21:27:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 21:27:47,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 805 [2020-08-21 21:27:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:47,149 INFO L225 Difference]: With dead ends: 11142 [2020-08-21 21:27:47,150 INFO L226 Difference]: Without dead ends: 6124 [2020-08-21 21:27:47,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2020-08-21 21:27:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6124 states. [2020-08-21 21:27:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 5754. [2020-08-21 21:27:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5754 states. [2020-08-21 21:27:47,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5754 states to 5754 states and 6492 transitions. [2020-08-21 21:27:47,277 INFO L78 Accepts]: Start accepts. Automaton has 5754 states and 6492 transitions. Word has length 805 [2020-08-21 21:27:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:47,278 INFO L479 AbstractCegarLoop]: Abstraction has 5754 states and 6492 transitions. [2020-08-21 21:27:47,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:27:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5754 states and 6492 transitions. [2020-08-21 21:27:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 849 [2020-08-21 21:27:47,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:47,296 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:47,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:27:47,297 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -322323375, now seen corresponding path program 1 times [2020-08-21 21:27:47,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:47,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887035453] [2020-08-21 21:27:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 21:27:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-21 21:27:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-21 21:27:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:47,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 729 [2020-08-21 21:27:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 655 proven. 295 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-08-21 21:27:48,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887035453] [2020-08-21 21:27:48,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:48,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:27:48,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209266025] [2020-08-21 21:27:48,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:27:48,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:27:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:27:48,594 INFO L87 Difference]: Start difference. First operand 5754 states and 6492 transitions. Second operand 10 states. [2020-08-21 21:27:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:52,232 INFO L93 Difference]: Finished difference Result 11324 states and 12797 transitions. [2020-08-21 21:27:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 21:27:52,232 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 848 [2020-08-21 21:27:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:52,247 INFO L225 Difference]: With dead ends: 11324 [2020-08-21 21:27:52,248 INFO L226 Difference]: Without dead ends: 5758 [2020-08-21 21:27:52,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-21 21:27:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2020-08-21 21:27:52,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5756. [2020-08-21 21:27:52,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5756 states. [2020-08-21 21:27:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5756 states to 5756 states and 6481 transitions. [2020-08-21 21:27:52,377 INFO L78 Accepts]: Start accepts. Automaton has 5756 states and 6481 transitions. Word has length 848 [2020-08-21 21:27:52,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:52,378 INFO L479 AbstractCegarLoop]: Abstraction has 5756 states and 6481 transitions. [2020-08-21 21:27:52,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:27:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 5756 states and 6481 transitions. [2020-08-21 21:27:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 878 [2020-08-21 21:27:52,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:52,401 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:52,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:27:52,402 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1192494146, now seen corresponding path program 1 times [2020-08-21 21:27:52,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:52,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507795243] [2020-08-21 21:27:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:52,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:52,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:52,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:52,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:52,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 21:27:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:52,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 21:27:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:52,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2020-08-21 21:27:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:53,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-21 21:27:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:53,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2295 backedges. 616 proven. 160 refuted. 0 times theorem prover too weak. 1519 trivial. 0 not checked. [2020-08-21 21:27:53,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507795243] [2020-08-21 21:27:53,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:53,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:27:53,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75215495] [2020-08-21 21:27:53,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:27:53,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:53,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:27:53,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:27:53,538 INFO L87 Difference]: Start difference. First operand 5756 states and 6481 transitions. Second operand 9 states. [2020-08-21 21:27:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:27:56,869 INFO L93 Difference]: Finished difference Result 13170 states and 14921 transitions. [2020-08-21 21:27:56,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:27:56,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 877 [2020-08-21 21:27:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:27:56,893 INFO L225 Difference]: With dead ends: 13170 [2020-08-21 21:27:56,893 INFO L226 Difference]: Without dead ends: 7602 [2020-08-21 21:27:56,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:27:56,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2020-08-21 21:27:57,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7416. [2020-08-21 21:27:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7416 states. [2020-08-21 21:27:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7416 states to 7416 states and 8323 transitions. [2020-08-21 21:27:57,090 INFO L78 Accepts]: Start accepts. Automaton has 7416 states and 8323 transitions. Word has length 877 [2020-08-21 21:27:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:27:57,092 INFO L479 AbstractCegarLoop]: Abstraction has 7416 states and 8323 transitions. [2020-08-21 21:27:57,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:27:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 7416 states and 8323 transitions. [2020-08-21 21:27:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1112 [2020-08-21 21:27:57,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:27:57,137 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:27:57,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:27:57,138 INFO L427 AbstractCegarLoop]: === Iteration 15 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:27:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:27:57,139 INFO L82 PathProgramCache]: Analyzing trace with hash -488991978, now seen corresponding path program 1 times [2020-08-21 21:27:57,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:27:57,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601872026] [2020-08-21 21:27:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:27:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:27:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 21:27:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 21:27:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 21:27:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 21:27:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-21 21:27:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-21 21:27:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 631 [2020-08-21 21:27:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 810 [2020-08-21 21:27:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:57,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 992 [2020-08-21 21:27:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:27:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3771 backedges. 1325 proven. 395 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-08-21 21:27:58,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601872026] [2020-08-21 21:27:58,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:27:58,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:27:58,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432985690] [2020-08-21 21:27:58,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:27:58,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:27:58,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:27:58,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:27:58,644 INFO L87 Difference]: Start difference. First operand 7416 states and 8323 transitions. Second operand 9 states. [2020-08-21 21:28:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:28:01,718 INFO L93 Difference]: Finished difference Result 17064 states and 19350 transitions. [2020-08-21 21:28:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 21:28:01,719 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1111 [2020-08-21 21:28:01,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:28:01,754 INFO L225 Difference]: With dead ends: 17064 [2020-08-21 21:28:01,755 INFO L226 Difference]: Without dead ends: 9836 [2020-08-21 21:28:01,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-08-21 21:28:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2020-08-21 21:28:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8722. [2020-08-21 21:28:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8722 states. [2020-08-21 21:28:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8722 states to 8722 states and 9968 transitions. [2020-08-21 21:28:01,951 INFO L78 Accepts]: Start accepts. Automaton has 8722 states and 9968 transitions. Word has length 1111 [2020-08-21 21:28:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:28:01,953 INFO L479 AbstractCegarLoop]: Abstraction has 8722 states and 9968 transitions. [2020-08-21 21:28:01,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:28:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 8722 states and 9968 transitions.