/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:28:47,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:47,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:47,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:47,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:47,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:47,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:47,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:47,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:48,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:48,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:48,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:48,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:48,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:48,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:48,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:48,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:48,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:48,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:48,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:48,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:48,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:48,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:48,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:48,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:48,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 10:28:48,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 10:28:48,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 10:28:48,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 10:28:48,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 10:28:48,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 10:28:48,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 10:28:48,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 10:28:48,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:48,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:48,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:48,030 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 [2020-09-21 10:28:48,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:48,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:48,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:48,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:48,058 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:48,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:48,058 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:48,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:48,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:48,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:48,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:48,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:48,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:48,060 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:48,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:48,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:48,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:48,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:48,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:48,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:48,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:48,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:48,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:48,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:48,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:48,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:48,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:48,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:48,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:48,063 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 -> false [2020-09-21 10:28:48,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:48,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:48,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:48,578 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:48,578 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:48,580 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-09-21 10:28:48,660 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a1a8e6cd/ea4a2e1453684ae48b864c35f8b7384b/FLAG52b0a67e8 [2020-09-21 10:28:49,217 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:49,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/lu.cmp.c [2020-09-21 10:28:49,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a1a8e6cd/ea4a2e1453684ae48b864c35f8b7384b/FLAG52b0a67e8 [2020-09-21 10:28:49,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a1a8e6cd/ea4a2e1453684ae48b864c35f8b7384b [2020-09-21 10:28:49,555 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:49,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:49,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:49,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:49,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:49,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:49" (1/1) ... [2020-09-21 10:28:49,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4576ff6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:49, skipping insertion in model container [2020-09-21 10:28:49,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:49" (1/1) ... [2020-09-21 10:28:49,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:49,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:49,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:49,889 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:49,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:50,052 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:50,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50 WrapperNode [2020-09-21 10:28:50,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:50,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:50,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:50,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:50,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (1/1) ... [2020-09-21 10:28:50,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (1/1) ... [2020-09-21 10:28:50,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (1/1) ... [2020-09-21 10:28:50,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (1/1) ... [2020-09-21 10:28:50,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (1/1) ... [2020-09-21 10:28:50,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (1/1) ... [2020-09-21 10:28:50,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (1/1) ... [2020-09-21 10:28:50,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:50,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:50,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:50,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:50,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (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 [2020-09-21 10:28:50,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:50,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:50,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:50,200 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-09-21 10:28:50,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:50,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-09-21 10:28:50,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:50,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:50,201 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-09-21 10:28:50,201 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-09-21 10:28:50,201 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:50,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-21 10:28:50,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-21 10:28:50,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:28:50,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:28:50,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:50,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:50,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:50,698 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-21 10:28:50,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:50 BoogieIcfgContainer [2020-09-21 10:28:50,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:50,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:50,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:50,709 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:50,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:49" (1/3) ... [2020-09-21 10:28:50,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27329091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:50, skipping insertion in model container [2020-09-21 10:28:50,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:50" (2/3) ... [2020-09-21 10:28:50,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27329091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:50, skipping insertion in model container [2020-09-21 10:28:50,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:50" (3/3) ... [2020-09-21 10:28:50,713 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-09-21 10:28:50,725 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:50,737 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:50,756 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:50,788 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:50,788 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:50,788 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:50,788 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:50,789 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:50,789 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:50,789 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:50,789 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-21 10:28:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 10:28:50,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:50,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:50,824 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-09-21 10:28:50,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:50,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33088888] [2020-09-21 10:28:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:51,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:51,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33088888] [2020-09-21 10:28:51,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:51,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:28:51,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302354716] [2020-09-21 10:28:51,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:28:51,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:28:51,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:51,157 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-21 10:28:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:51,463 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-09-21 10:28:51,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:28:51,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-21 10:28:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:51,479 INFO L225 Difference]: With dead ends: 127 [2020-09-21 10:28:51,479 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 10:28:51,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 10:28:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-09-21 10:28:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 10:28:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-09-21 10:28:51,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-09-21 10:28:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:51,545 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-09-21 10:28:51,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:28:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-09-21 10:28:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 10:28:51,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:51,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:51,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:51,548 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:51,548 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-09-21 10:28:51,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:51,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521566116] [2020-09-21 10:28:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:51,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:51,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521566116] [2020-09-21 10:28:51,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:51,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:51,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083094177] [2020-09-21 10:28:51,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:51,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:51,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:51,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:51,704 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-09-21 10:28:51,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:51,867 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-09-21 10:28:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:28:51,868 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-21 10:28:51,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:51,869 INFO L225 Difference]: With dead ends: 40 [2020-09-21 10:28:51,869 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:28:51,870 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 [2020-09-21 10:28:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:28:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-09-21 10:28:51,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:28:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-09-21 10:28:51,878 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-09-21 10:28:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:51,879 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-09-21 10:28:51,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-09-21 10:28:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:28:51,880 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:51,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:51,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:51,880 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-09-21 10:28:51,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:51,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310878094] [2020-09-21 10:28:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:51,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:52,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310878094] [2020-09-21 10:28:52,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:52,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:52,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136763812] [2020-09-21 10:28:52,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:52,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:52,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:52,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:52,003 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-09-21 10:28:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:52,158 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-09-21 10:28:52,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:28:52,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 10:28:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:52,160 INFO L225 Difference]: With dead ends: 48 [2020-09-21 10:28:52,161 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 10:28:52,161 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 [2020-09-21 10:28:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 10:28:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-09-21 10:28:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 10:28:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-21 10:28:52,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-09-21 10:28:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:52,170 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-21 10:28:52,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-21 10:28:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 10:28:52,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:52,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:52,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:52,172 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-09-21 10:28:52,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:52,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207949340] [2020-09-21 10:28:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:28:52,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207949340] [2020-09-21 10:28:52,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:52,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 10:28:52,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328791346] [2020-09-21 10:28:52,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:28:52,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:52,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:28:52,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:52,300 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-09-21 10:28:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:52,516 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-09-21 10:28:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:28:52,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-21 10:28:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:52,518 INFO L225 Difference]: With dead ends: 37 [2020-09-21 10:28:52,518 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 10:28:52,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:52,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 10:28:52,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-09-21 10:28:52,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 10:28:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-21 10:28:52,529 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-09-21 10:28:52,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:52,529 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-21 10:28:52,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:28:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-21 10:28:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 10:28:52,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:52,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:52,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:28:52,532 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:52,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:52,533 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-09-21 10:28:52,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:52,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501105235] [2020-09-21 10:28:52,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 10:28:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:28:52,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501105235] [2020-09-21 10:28:52,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:52,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:28:52,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946680428] [2020-09-21 10:28:52,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:28:52,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:52,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:28:52,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:28:52,655 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-09-21 10:28:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:52,826 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-09-21 10:28:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:28:52,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-09-21 10:28:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:52,830 INFO L225 Difference]: With dead ends: 66 [2020-09-21 10:28:52,830 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 10:28:52,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 10:28:52,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-09-21 10:28:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-21 10:28:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-21 10:28:52,840 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-09-21 10:28:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:52,841 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-21 10:28:52,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:28:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-21 10:28:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:28:52,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:52,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:52,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:28:52,843 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-09-21 10:28:52,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:52,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531728531] [2020-09-21 10:28:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-09-21 10:28:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:28:52,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531728531] [2020-09-21 10:28:52,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:52,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:28:52,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930664421] [2020-09-21 10:28:52,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:52,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:52,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:52,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:52,959 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 7 states. [2020-09-21 10:28:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:53,132 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2020-09-21 10:28:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:53,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-09-21 10:28:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:53,134 INFO L225 Difference]: With dead ends: 78 [2020-09-21 10:28:53,134 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 10:28:53,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 10:28:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-09-21 10:28:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-21 10:28:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-09-21 10:28:53,143 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2020-09-21 10:28:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:53,144 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-09-21 10:28:53,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-09-21 10:28:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-21 10:28:53,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:53,145 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:53,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:28:53,146 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:53,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1724935017, now seen corresponding path program 3 times [2020-09-21 10:28:53,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:53,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025631764] [2020-09-21 10:28:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:53,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:53,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-21 10:28:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-21 10:28:53,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025631764] [2020-09-21 10:28:53,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:53,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:28:53,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895058389] [2020-09-21 10:28:53,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:28:53,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:53,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:28:53,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:28:53,292 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 8 states. [2020-09-21 10:28:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:53,518 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-09-21 10:28:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:28:53,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-09-21 10:28:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:53,524 INFO L225 Difference]: With dead ends: 90 [2020-09-21 10:28:53,524 INFO L226 Difference]: Without dead ends: 62 [2020-09-21 10:28:53,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:28:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-21 10:28:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-09-21 10:28:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-21 10:28:53,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-09-21 10:28:53,534 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 45 [2020-09-21 10:28:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:53,535 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-09-21 10:28:53,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:28:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-09-21 10:28:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-21 10:28:53,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:53,537 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:53,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:28:53,537 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash 192379017, now seen corresponding path program 4 times [2020-09-21 10:28:53,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:53,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53604024] [2020-09-21 10:28:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:53,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:53,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-09-21 10:28:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 76 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-09-21 10:28:53,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53604024] [2020-09-21 10:28:53,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:53,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:53,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072254882] [2020-09-21 10:28:53,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:53,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:53,677 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 9 states. [2020-09-21 10:28:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:53,899 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-09-21 10:28:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:28:53,900 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-09-21 10:28:53,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:53,901 INFO L225 Difference]: With dead ends: 102 [2020-09-21 10:28:53,901 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 10:28:53,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2020-09-21 10:28:53,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 10:28:53,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-21 10:28:53,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-21 10:28:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-09-21 10:28:53,912 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 53 [2020-09-21 10:28:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:53,912 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-09-21 10:28:53,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-09-21 10:28:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:28:53,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:53,915 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:53,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:28:53,915 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -915579223, now seen corresponding path program 5 times [2020-09-21 10:28:53,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:53,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141640485] [2020-09-21 10:28:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-21 10:28:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 114 proven. 45 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-21 10:28:54,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141640485] [2020-09-21 10:28:54,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:54,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:28:54,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148152491] [2020-09-21 10:28:54,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:28:54,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:54,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:28:54,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:54,129 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 10 states. [2020-09-21 10:28:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:54,371 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2020-09-21 10:28:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:28:54,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-09-21 10:28:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:54,375 INFO L225 Difference]: With dead ends: 108 [2020-09-21 10:28:54,376 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 10:28:54,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-09-21 10:28:54,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 10:28:54,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-09-21 10:28:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-21 10:28:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-09-21 10:28:54,395 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 61 [2020-09-21 10:28:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:54,395 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-09-21 10:28:54,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:28:54,395 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-09-21 10:28:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 10:28:54,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:54,398 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:54,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:28:54,399 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash -752575031, now seen corresponding path program 6 times [2020-09-21 10:28:54,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:54,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030522317] [2020-09-21 10:28:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:28:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 150 proven. 41 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-09-21 10:28:54,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030522317] [2020-09-21 10:28:54,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:54,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:28:54,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382034581] [2020-09-21 10:28:54,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:54,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:54,618 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 7 states. [2020-09-21 10:28:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:54,847 INFO L93 Difference]: Finished difference Result 168 states and 196 transitions. [2020-09-21 10:28:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:28:54,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-09-21 10:28:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:54,849 INFO L225 Difference]: With dead ends: 168 [2020-09-21 10:28:54,849 INFO L226 Difference]: Without dead ends: 133 [2020-09-21 10:28:54,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-21 10:28:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 81. [2020-09-21 10:28:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 10:28:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-09-21 10:28:54,864 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 69 [2020-09-21 10:28:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:54,865 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-09-21 10:28:54,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-09-21 10:28:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-21 10:28:54,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:54,866 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:54,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:28:54,867 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:54,867 INFO L82 PathProgramCache]: Analyzing trace with hash -618561525, now seen corresponding path program 7 times [2020-09-21 10:28:54,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:54,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346215752] [2020-09-21 10:28:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:28:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 2 proven. 159 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-21 10:28:54,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346215752] [2020-09-21 10:28:54,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:54,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:28:54,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194498598] [2020-09-21 10:28:54,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:54,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:54,986 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 7 states. [2020-09-21 10:28:55,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:55,225 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2020-09-21 10:28:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:55,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-09-21 10:28:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:55,227 INFO L225 Difference]: With dead ends: 109 [2020-09-21 10:28:55,227 INFO L226 Difference]: Without dead ends: 107 [2020-09-21 10:28:55,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-21 10:28:55,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-09-21 10:28:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-21 10:28:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-09-21 10:28:55,244 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 69 [2020-09-21 10:28:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:55,244 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-09-21 10:28:55,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-09-21 10:28:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-21 10:28:55,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:55,251 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 16, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:55,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:28:55,251 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1650306840, now seen corresponding path program 8 times [2020-09-21 10:28:55,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:55,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239217852] [2020-09-21 10:28:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:28:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:28:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 4 proven. 479 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-09-21 10:28:55,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239217852] [2020-09-21 10:28:55,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:55,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:28:55,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841972798] [2020-09-21 10:28:55,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:28:55,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:28:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:28:55,452 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 8 states. [2020-09-21 10:28:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:55,718 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2020-09-21 10:28:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:28:55,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2020-09-21 10:28:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:55,721 INFO L225 Difference]: With dead ends: 142 [2020-09-21 10:28:55,721 INFO L226 Difference]: Without dead ends: 140 [2020-09-21 10:28:55,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:28:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-21 10:28:55,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2020-09-21 10:28:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-21 10:28:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2020-09-21 10:28:55,750 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 102 [2020-09-21 10:28:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:55,751 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2020-09-21 10:28:55,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:28:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2020-09-21 10:28:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-21 10:28:55,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:55,758 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 22, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:55,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 10:28:55,759 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1572842069, now seen corresponding path program 9 times [2020-09-21 10:28:55,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:55,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065512071] [2020-09-21 10:28:55,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:28:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:28:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:55,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:28:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 619 proven. 297 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-09-21 10:28:56,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065512071] [2020-09-21 10:28:56,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:56,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:56,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448143447] [2020-09-21 10:28:56,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:56,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:56,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:56,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:56,017 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand 9 states. [2020-09-21 10:28:56,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:56,393 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2020-09-21 10:28:56,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 10:28:56,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-09-21 10:28:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:56,396 INFO L225 Difference]: With dead ends: 239 [2020-09-21 10:28:56,396 INFO L226 Difference]: Without dead ends: 176 [2020-09-21 10:28:56,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:28:56,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-21 10:28:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2020-09-21 10:28:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-21 10:28:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2020-09-21 10:28:56,408 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 135 [2020-09-21 10:28:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:56,409 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2020-09-21 10:28:56,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2020-09-21 10:28:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-21 10:28:56,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:56,411 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 21, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:56,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 10:28:56,412 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash -2016742743, now seen corresponding path program 10 times [2020-09-21 10:28:56,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:56,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768357611] [2020-09-21 10:28:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:28:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:28:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:28:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 6 proven. 960 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-09-21 10:28:56,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768357611] [2020-09-21 10:28:56,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:56,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:28:56,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39401723] [2020-09-21 10:28:56,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:28:56,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:56,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:28:56,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:28:56,628 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand 9 states. [2020-09-21 10:28:56,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:56,930 INFO L93 Difference]: Finished difference Result 175 states and 204 transitions. [2020-09-21 10:28:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:28:56,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-09-21 10:28:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:56,933 INFO L225 Difference]: With dead ends: 175 [2020-09-21 10:28:56,933 INFO L226 Difference]: Without dead ends: 173 [2020-09-21 10:28:56,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:28:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-21 10:28:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2020-09-21 10:28:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-21 10:28:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2020-09-21 10:28:56,954 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 135 [2020-09-21 10:28:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:56,954 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2020-09-21 10:28:56,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:28:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2020-09-21 10:28:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-09-21 10:28:56,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:56,959 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 27, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:56,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 10:28:56,959 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1916434374, now seen corresponding path program 11 times [2020-09-21 10:28:56,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:56,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358867195] [2020-09-21 10:28:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:28:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:28:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:28:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-21 10:28:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 8 proven. 1602 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2020-09-21 10:28:57,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358867195] [2020-09-21 10:28:57,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:57,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:28:57,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803761861] [2020-09-21 10:28:57,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:28:57,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:28:57,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:57,328 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand 10 states. [2020-09-21 10:28:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:57,755 INFO L93 Difference]: Finished difference Result 208 states and 244 transitions. [2020-09-21 10:28:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:28:57,756 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 168 [2020-09-21 10:28:57,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:57,758 INFO L225 Difference]: With dead ends: 208 [2020-09-21 10:28:57,758 INFO L226 Difference]: Without dead ends: 206 [2020-09-21 10:28:57,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:28:57,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-21 10:28:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 204. [2020-09-21 10:28:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-21 10:28:57,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2020-09-21 10:28:57,779 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 168 [2020-09-21 10:28:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:57,780 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2020-09-21 10:28:57,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:28:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2020-09-21 10:28:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-21 10:28:57,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:57,785 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 33, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:28:57,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 10:28:57,786 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:57,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash -886069047, now seen corresponding path program 12 times [2020-09-21 10:28:57,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:57,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842060869] [2020-09-21 10:28:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-21 10:28:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-21 10:28:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-09-21 10:28:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-09-21 10:28:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-09-21 10:28:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 10 proven. 790 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2020-09-21 10:28:58,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842060869] [2020-09-21 10:28:58,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:58,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:28:58,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206698378] [2020-09-21 10:28:58,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:28:58,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:58,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:28:58,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:28:58,179 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand 7 states. [2020-09-21 10:28:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:58,391 INFO L93 Difference]: Finished difference Result 204 states and 240 transitions. [2020-09-21 10:28:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:28:58,392 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 201 [2020-09-21 10:28:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:58,393 INFO L225 Difference]: With dead ends: 204 [2020-09-21 10:28:58,393 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 10:28:58,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:28:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 10:28:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 10:28:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 10:28:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 10:28:58,396 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 201 [2020-09-21 10:28:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:58,397 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 10:28:58,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:28:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 10:28:58,397 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 10:28:58,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 10:28:58,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 10:28:58,603 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 7 [2020-09-21 10:28:58,870 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-09-21 10:28:58,870 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-09-21 10:28:58,870 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-09-21 10:28:58,871 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-09-21 10:28:58,871 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-09-21 10:28:58,871 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-09-21 10:28:58,871 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-09-21 10:28:58,872 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-09-21 10:28:58,872 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-09-21 10:28:58,872 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-09-21 10:28:58,872 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-09-21 10:28:58,872 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-09-21 10:28:58,873 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-09-21 10:28:58,873 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-09-21 10:28:58,899 INFO L264 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: (and (= |old(#memory_real)| |#memory_real|) (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-09-21 10:28:58,900 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-09-21 10:28:58,900 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-09-21 10:28:58,900 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-09-21 10:28:58,900 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-09-21 10:28:58,900 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-09-21 10:28:58,901 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-09-21 10:28:58,901 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-09-21 10:28:58,901 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-09-21 10:28:58,901 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-09-21 10:28:58,901 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-09-21 10:28:58,902 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-09-21 10:28:58,902 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-09-21 10:28:58,902 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-09-21 10:28:58,902 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-09-21 10:28:58,902 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-09-21 10:28:58,902 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-09-21 10:28:58,903 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-09-21 10:28:58,903 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-09-21 10:28:58,903 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:28:58,905 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#x~0.offset| |old(~#x~0.offset)|) (= |old(#memory_real)| |#memory_real|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |old(#length)| |#length|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#x~0.base| |old(~#x~0.base)|) (= |~#a~0.base| |old(~#a~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 10:28:58,905 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:28:58,905 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-09-21 10:28:58,905 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-09-21 10:28:58,906 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-09-21 10:28:58,906 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-09-21 10:28:58,906 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-09-21 10:28:58,907 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 10:28:58,907 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 10:28:58,907 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 10:28:58,907 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 10:28:58,907 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-09-21 10:28:58,907 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-09-21 10:28:58,908 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-09-21 10:28:58,908 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-09-21 10:28:58,908 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-09-21 10:28:58,908 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-09-21 10:28:58,908 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-09-21 10:28:58,908 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-09-21 10:28:58,908 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-09-21 10:28:58,909 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: (and (= |old(#memory_real)| |#memory_real|) (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-09-21 10:28:58,909 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-09-21 10:28:58,909 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (and (<= main_~i~0 5) (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-09-21 10:28:58,909 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (and (<= main_~i~0 5) (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-09-21 10:28:58,909 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-09-21 10:28:58,909 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-21 10:28:58,909 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-21 10:28:58,910 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-09-21 10:28:58,910 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-09-21 10:28:58,910 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-09-21 10:28:58,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:58 BoogieIcfgContainer [2020-09-21 10:28:58,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:58,944 INFO L168 Benchmark]: Toolchain (without parser) took 9381.65 ms. Allocated memory was 140.0 MB in the beginning and 340.3 MB in the end (delta: 200.3 MB). Free memory was 102.1 MB in the beginning and 308.7 MB in the end (delta: -206.5 MB). Peak memory consumption was 175.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:58,946 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 10:28:58,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 492.37 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.5 MB in the beginning and 182.5 MB in the end (delta: -81.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:58,952 INFO L168 Benchmark]: Boogie Preprocessor took 69.37 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 179.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:58,953 INFO L168 Benchmark]: RCFGBuilder took 579.93 ms. Allocated memory is still 203.9 MB. Free memory was 179.5 MB in the beginning and 152.2 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:58,956 INFO L168 Benchmark]: TraceAbstraction took 8230.81 ms. Allocated memory was 203.9 MB in the beginning and 340.3 MB in the end (delta: 136.3 MB). Free memory was 151.5 MB in the beginning and 308.7 MB in the end (delta: -157.2 MB). Peak memory consumption was 160.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:58,963 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 492.37 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.5 MB in the beginning and 182.5 MB in the end (delta: -81.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.37 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 179.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 579.93 ms. Allocated memory is still 203.9 MB. Free memory was 179.5 MB in the beginning and 152.2 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8230.81 ms. Allocated memory was 203.9 MB in the beginning and 340.3 MB in the end (delta: 136.3 MB). Free memory was 151.5 MB in the beginning and 308.7 MB in the end (delta: -157.2 MB). Peak memory consumption was 160.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: (i <= 5 && n <= 5) && 5 <= n - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: n <= 5 && 5 <= n - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.6s, OverallIterations: 16, TraceHistogramMax: 36, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 467 SDslu, 506 SDs, 0 SdLazy, 1311 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 248 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 142 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 65 PreInvPairs, 141 NumberOfFragments, 96 HoareAnnotationTreeSize, 65 FomulaSimplifications, 2732 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 21 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1160 NumberOfCodeBlocks, 1160 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1144 ConstructedInterpolants, 0 QuantifiedInterpolants, 415440 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 4614/9037 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...