/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:53:42,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:53:42,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:53:42,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:53:42,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:53:42,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:53:42,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:53:42,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:53:42,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:53:42,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:53:42,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:53:42,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:53:42,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:53:42,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:53:42,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:53:42,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:53:42,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:53:42,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:53:42,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:53:42,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:53:42,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:53:42,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:53:42,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:53:42,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:53:42,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:53:42,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:53:42,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:53:42,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:53:42,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 02:53:42,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:53:42,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:53:42,532 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:53:42,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:53:42,533 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:53:42,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:53:42,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:53:42,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:53:42,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:53:42,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:53:42,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:53:42,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:53:42,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:53:42,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:53:42,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:53:42,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:53:42,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:53:42,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:53:42,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:53:42,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:53:42,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:53:42,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:53:42,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:53:42,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:53:42,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:53:42,542 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:53:42,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:53:42,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:53:42,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:53:42,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:53:42,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:53:42,876 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:53:42,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:53:42,881 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:53:42,882 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:53:42,883 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-19 02:53:42,955 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81dbc9668/010ee34c17c04b24ba2faf33803578d8/FLAG6b04ccce4 [2020-08-19 02:53:43,379 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:53:43,380 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-19 02:53:43,386 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81dbc9668/010ee34c17c04b24ba2faf33803578d8/FLAG6b04ccce4 [2020-08-19 02:53:43,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81dbc9668/010ee34c17c04b24ba2faf33803578d8 [2020-08-19 02:53:43,773 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:53:43,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:53:43,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:53:43,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:53:43,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:53:43,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:53:43" (1/1) ... [2020-08-19 02:53:43,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632a6d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:43, skipping insertion in model container [2020-08-19 02:53:43,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:53:43" (1/1) ... [2020-08-19 02:53:43,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:53:43,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:53:43,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:53:43,989 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:53:44,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:53:44,030 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:53:44,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44 WrapperNode [2020-08-19 02:53:44,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:53:44,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:53:44,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:53:44,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:53:44,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... [2020-08-19 02:53:44,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... [2020-08-19 02:53:44,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... [2020-08-19 02:53:44,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... [2020-08-19 02:53:44,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... [2020-08-19 02:53:44,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... [2020-08-19 02:53:44,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... [2020-08-19 02:53:44,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:53:44,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:53:44,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:53:44,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:53:44,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:53:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:53:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:53:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:53:44,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:53:44,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:53:44,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:53:44,207 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:53:44,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:53:44,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:53:44,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:53:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:53:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:53:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:53:44,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:53:44,410 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:53:44,411 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 02:53:44,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:53:44 BoogieIcfgContainer [2020-08-19 02:53:44,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:53:44,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:53:44,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:53:44,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:53:44,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:53:43" (1/3) ... [2020-08-19 02:53:44,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb03579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:53:44, skipping insertion in model container [2020-08-19 02:53:44,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:53:44" (2/3) ... [2020-08-19 02:53:44,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb03579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:53:44, skipping insertion in model container [2020-08-19 02:53:44,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:53:44" (3/3) ... [2020-08-19 02:53:44,424 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-08-19 02:53:44,435 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:53:44,442 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:53:44,456 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:53:44,481 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:53:44,481 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:53:44,481 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:53:44,482 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:53:44,482 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:53:44,482 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:53:44,482 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:53:44,482 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:53:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-19 02:53:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:53:44,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:44,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:44,508 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-08-19 02:53:44,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:44,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284053205] [2020-08-19 02:53:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:44,777 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-08-19 02:53:44,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:44,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284053205] [2020-08-19 02:53:44,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:44,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 02:53:44,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635094643] [2020-08-19 02:53:44,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 02:53:44,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 02:53:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:53:44,813 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-19 02:53:44,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:44,889 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-08-19 02:53:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 02:53:44,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-19 02:53:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:44,901 INFO L225 Difference]: With dead ends: 42 [2020-08-19 02:53:44,901 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 02:53:44,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 02:53:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 02:53:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 02:53:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 02:53:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-19 02:53:44,939 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-08-19 02:53:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:44,939 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-19 02:53:44,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 02:53:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-19 02:53:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 02:53:44,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:44,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:44,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:53:44,942 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-08-19 02:53:44,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:44,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714002406] [2020-08-19 02:53:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:45,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714002406] [2020-08-19 02:53:45,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:45,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:53:45,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56454167] [2020-08-19 02:53:45,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:53:45,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:45,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:53:45,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:53:45,031 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-08-19 02:53:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:45,099 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-19 02:53:45,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:53:45,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-19 02:53:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:45,103 INFO L225 Difference]: With dead ends: 35 [2020-08-19 02:53:45,103 INFO L226 Difference]: Without dead ends: 25 [2020-08-19 02:53:45,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:53:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-19 02:53:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-19 02:53:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-19 02:53:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-19 02:53:45,113 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-08-19 02:53:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:45,114 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-19 02:53:45,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:53:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-19 02:53:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 02:53:45,115 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:45,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:45,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:53:45,116 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-08-19 02:53:45,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:45,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777734290] [2020-08-19 02:53:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:45,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777734290] [2020-08-19 02:53:45,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:45,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:53:45,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507106779] [2020-08-19 02:53:45,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:53:45,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:45,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:53:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:53:45,244 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-19 02:53:45,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:45,336 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-08-19 02:53:45,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:53:45,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-19 02:53:45,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:45,338 INFO L225 Difference]: With dead ends: 45 [2020-08-19 02:53:45,338 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 02:53:45,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:53:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 02:53:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-08-19 02:53:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 02:53:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-19 02:53:45,347 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-08-19 02:53:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:45,348 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-19 02:53:45,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:53:45,348 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-19 02:53:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 02:53:45,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:45,349 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:45,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:53:45,350 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-08-19 02:53:45,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:45,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685333975] [2020-08-19 02:53:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:45,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685333975] [2020-08-19 02:53:45,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:45,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:53:45,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808722688] [2020-08-19 02:53:45,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:53:45,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:45,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:53:45,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:45,437 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-19 02:53:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:45,540 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-08-19 02:53:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:53:45,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-19 02:53:45,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:45,542 INFO L225 Difference]: With dead ends: 56 [2020-08-19 02:53:45,542 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 02:53:45,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 02:53:45,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-08-19 02:53:45,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 02:53:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-08-19 02:53:45,552 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-08-19 02:53:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:45,552 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-08-19 02:53:45,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:53:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-08-19 02:53:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 02:53:45,554 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:45,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:45,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:53:45,554 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:45,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-08-19 02:53:45,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:45,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344816836] [2020-08-19 02:53:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:45,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344816836] [2020-08-19 02:53:45,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:45,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:53:45,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242755808] [2020-08-19 02:53:45,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:53:45,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:45,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:53:45,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:53:45,684 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-08-19 02:53:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:45,783 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-19 02:53:45,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:53:45,784 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-19 02:53:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:45,785 INFO L225 Difference]: With dead ends: 67 [2020-08-19 02:53:45,785 INFO L226 Difference]: Without dead ends: 46 [2020-08-19 02:53:45,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:53:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-19 02:53:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-19 02:53:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 02:53:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-19 02:53:45,793 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-08-19 02:53:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:45,794 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-19 02:53:45,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:53:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-19 02:53:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:53:45,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:45,795 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:45,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:53:45,796 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-08-19 02:53:45,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:45,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356290367] [2020-08-19 02:53:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 02:53:45,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356290367] [2020-08-19 02:53:45,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:45,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 02:53:45,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102847042] [2020-08-19 02:53:45,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:53:45,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:53:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:45,911 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-08-19 02:53:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:46,015 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-08-19 02:53:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:53:46,015 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-19 02:53:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:46,017 INFO L225 Difference]: With dead ends: 45 [2020-08-19 02:53:46,018 INFO L226 Difference]: Without dead ends: 40 [2020-08-19 02:53:46,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:53:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-19 02:53:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-19 02:53:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-19 02:53:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-19 02:53:46,025 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-08-19 02:53:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:46,026 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-19 02:53:46,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:53:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-19 02:53:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:53:46,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:46,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:46,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:53:46,028 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:46,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-08-19 02:53:46,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:46,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416884054] [2020-08-19 02:53:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:46,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416884054] [2020-08-19 02:53:46,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:46,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:53:46,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662683783] [2020-08-19 02:53:46,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:53:46,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:46,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:53:46,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:53:46,117 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-08-19 02:53:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:46,213 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-08-19 02:53:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:53:46,214 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-19 02:53:46,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:46,215 INFO L225 Difference]: With dead ends: 77 [2020-08-19 02:53:46,215 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 02:53:46,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:53:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 02:53:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-19 02:53:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 02:53:46,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-19 02:53:46,224 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-08-19 02:53:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:46,224 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-19 02:53:46,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:53:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-19 02:53:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-19 02:53:46,225 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:46,225 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:46,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:53:46,226 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:46,226 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-08-19 02:53:46,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:46,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503768988] [2020-08-19 02:53:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:46,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503768988] [2020-08-19 02:53:46,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:46,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:53:46,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916272728] [2020-08-19 02:53:46,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:53:46,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:46,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:53:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:53:46,316 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-08-19 02:53:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:46,415 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-19 02:53:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:53:46,416 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-19 02:53:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:46,417 INFO L225 Difference]: With dead ends: 88 [2020-08-19 02:53:46,417 INFO L226 Difference]: Without dead ends: 59 [2020-08-19 02:53:46,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:53:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-19 02:53:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-08-19 02:53:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 02:53:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-08-19 02:53:46,425 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-08-19 02:53:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:46,426 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-08-19 02:53:46,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:53:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-08-19 02:53:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 02:53:46,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:46,427 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:46,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:53:46,428 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:46,428 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-08-19 02:53:46,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:46,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673641665] [2020-08-19 02:53:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:46,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:46,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673641665] [2020-08-19 02:53:46,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:46,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:53:46,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818081728] [2020-08-19 02:53:46,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:53:46,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:46,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:53:46,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:53:46,532 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-08-19 02:53:46,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:46,662 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-08-19 02:53:46,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:53:46,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-19 02:53:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:46,664 INFO L225 Difference]: With dead ends: 99 [2020-08-19 02:53:46,664 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 02:53:46,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:53:46,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 02:53:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-08-19 02:53:46,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-19 02:53:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-08-19 02:53:46,672 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-08-19 02:53:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:46,673 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-08-19 02:53:46,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:53:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-08-19 02:53:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-19 02:53:46,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:46,674 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:46,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:53:46,675 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-08-19 02:53:46,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:46,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903624586] [2020-08-19 02:53:46,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:46,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903624586] [2020-08-19 02:53:46,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:46,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:53:46,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100177534] [2020-08-19 02:53:46,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:53:46,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:53:46,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:53:46,794 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2020-08-19 02:53:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:46,916 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-08-19 02:53:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:53:46,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-19 02:53:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:46,918 INFO L225 Difference]: With dead ends: 110 [2020-08-19 02:53:46,918 INFO L226 Difference]: Without dead ends: 73 [2020-08-19 02:53:46,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:53:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-19 02:53:46,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-08-19 02:53:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 02:53:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-08-19 02:53:46,926 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-08-19 02:53:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:46,927 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-08-19 02:53:46,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:53:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-08-19 02:53:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 02:53:46,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:46,928 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:46,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:53:46,928 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:46,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:46,929 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-08-19 02:53:46,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:46,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017930852] [2020-08-19 02:53:46,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:47,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:47,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017930852] [2020-08-19 02:53:47,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:47,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:53:47,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049777042] [2020-08-19 02:53:47,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:53:47,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:47,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:53:47,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:53:47,042 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 12 states. [2020-08-19 02:53:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:47,184 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-08-19 02:53:47,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:53:47,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-19 02:53:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:47,186 INFO L225 Difference]: With dead ends: 121 [2020-08-19 02:53:47,186 INFO L226 Difference]: Without dead ends: 80 [2020-08-19 02:53:47,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:53:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-19 02:53:47,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-08-19 02:53:47,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 02:53:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-19 02:53:47,200 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-08-19 02:53:47,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:47,201 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-19 02:53:47,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:53:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-19 02:53:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-19 02:53:47,202 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:47,202 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:47,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:53:47,203 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:47,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:47,203 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-08-19 02:53:47,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:47,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829714857] [2020-08-19 02:53:47,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:47,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:47,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829714857] [2020-08-19 02:53:47,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:47,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:53:47,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928461025] [2020-08-19 02:53:47,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:53:47,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:53:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:53:47,352 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 13 states. [2020-08-19 02:53:47,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:47,498 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-08-19 02:53:47,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 02:53:47,499 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-19 02:53:47,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:47,500 INFO L225 Difference]: With dead ends: 132 [2020-08-19 02:53:47,500 INFO L226 Difference]: Without dead ends: 87 [2020-08-19 02:53:47,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:53:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-19 02:53:47,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-08-19 02:53:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 02:53:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-19 02:53:47,511 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-08-19 02:53:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:47,512 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-19 02:53:47,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:53:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-19 02:53:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 02:53:47,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:47,513 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:47,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:53:47,514 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:47,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:47,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-08-19 02:53:47,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:47,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502873127] [2020-08-19 02:53:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:47,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:47,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502873127] [2020-08-19 02:53:47,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:47,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 02:53:47,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726232469] [2020-08-19 02:53:47,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 02:53:47,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:47,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 02:53:47,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:53:47,679 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 14 states. [2020-08-19 02:53:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:47,829 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-08-19 02:53:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:53:47,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-19 02:53:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:47,830 INFO L225 Difference]: With dead ends: 143 [2020-08-19 02:53:47,831 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 02:53:47,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:53:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 02:53:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-08-19 02:53:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-19 02:53:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-08-19 02:53:47,838 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-08-19 02:53:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:47,838 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-08-19 02:53:47,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 02:53:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-08-19 02:53:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 02:53:47,840 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:47,840 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:47,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:53:47,840 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:47,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-08-19 02:53:47,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:47,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225361489] [2020-08-19 02:53:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:47,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 02:53:48,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225361489] [2020-08-19 02:53:48,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:48,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 02:53:48,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162977601] [2020-08-19 02:53:48,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 02:53:48,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:48,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 02:53:48,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:53:48,004 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 15 states. [2020-08-19 02:53:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:48,176 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-08-19 02:53:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:53:48,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-19 02:53:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:48,178 INFO L225 Difference]: With dead ends: 154 [2020-08-19 02:53:48,178 INFO L226 Difference]: Without dead ends: 101 [2020-08-19 02:53:48,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:53:48,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-19 02:53:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-08-19 02:53:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 02:53:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-08-19 02:53:48,185 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-08-19 02:53:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:48,186 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-08-19 02:53:48,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 02:53:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-08-19 02:53:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-19 02:53:48,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:48,187 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:48,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:53:48,187 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:48,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-08-19 02:53:48,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:48,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978781241] [2020-08-19 02:53:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:48,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:48,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-19 02:53:48,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978781241] [2020-08-19 02:53:48,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:48,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:53:48,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253814874] [2020-08-19 02:53:48,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:53:48,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:48,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:53:48,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:53:48,290 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 7 states. [2020-08-19 02:53:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:48,368 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-08-19 02:53:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:53:48,369 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-19 02:53:48,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:48,370 INFO L225 Difference]: With dead ends: 93 [2020-08-19 02:53:48,370 INFO L226 Difference]: Without dead ends: 88 [2020-08-19 02:53:48,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:53:48,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-19 02:53:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-08-19 02:53:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 02:53:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-08-19 02:53:48,381 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 42 [2020-08-19 02:53:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:48,381 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-08-19 02:53:48,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:53:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-08-19 02:53:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-19 02:53:48,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:48,382 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:48,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:53:48,383 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:48,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1325635667, now seen corresponding path program 10 times [2020-08-19 02:53:48,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:48,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403933881] [2020-08-19 02:53:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:48,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-08-19 02:53:48,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403933881] [2020-08-19 02:53:48,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:48,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 02:53:48,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112623449] [2020-08-19 02:53:48,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:53:48,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:53:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:53:48,492 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 7 states. [2020-08-19 02:53:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:48,563 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-08-19 02:53:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:53:48,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-08-19 02:53:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:48,564 INFO L225 Difference]: With dead ends: 88 [2020-08-19 02:53:48,564 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:53:48,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:53:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:53:48,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:53:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:53:48,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:53:48,566 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-08-19 02:53:48,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:48,566 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:53:48,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:53:48,566 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:53:48,567 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:53:48,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 02:53:48,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:53:48,664 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:53:48,665 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-19 02:53:48,665 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:53:48,665 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:53:48,665 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:53:48,665 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:53:48,666 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:53:48,666 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-08-19 02:53:48,666 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-08-19 02:53:48,666 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-08-19 02:53:48,666 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-19 02:53:48,666 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-08-19 02:53:48,666 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-19 02:53:48,667 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-08-19 02:53:48,667 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-08-19 02:53:48,667 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-08-19 02:53:48,667 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-19 02:53:48,667 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-19 02:53:48,667 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-19 02:53:48,667 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-19 02:53:48,668 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-19 02:53:48,668 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-19 02:53:48,668 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-19 02:53:48,668 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-19 02:53:48,668 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-19 02:53:48,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:53:48 BoogieIcfgContainer [2020-08-19 02:53:48,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:53:48,688 INFO L168 Benchmark]: Toolchain (without parser) took 4913.83 ms. Allocated memory was 137.9 MB in the beginning and 286.3 MB in the end (delta: 148.4 MB). Free memory was 101.6 MB in the beginning and 251.4 MB in the end (delta: -149.9 MB). Peak memory consumption was 124.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:48,689 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-19 02:53:48,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.62 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 91.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:48,691 INFO L168 Benchmark]: Boogie Preprocessor took 114.55 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 177.7 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:48,692 INFO L168 Benchmark]: RCFGBuilder took 269.08 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 163.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:48,692 INFO L168 Benchmark]: TraceAbstraction took 4270.30 ms. Allocated memory was 199.8 MB in the beginning and 286.3 MB in the end (delta: 86.5 MB). Free memory was 162.7 MB in the beginning and 251.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:48,696 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.62 ms. Allocated memory is still 137.9 MB. Free memory was 101.4 MB in the beginning and 91.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.55 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 177.7 MB in the end (delta: -86.2 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.08 ms. Allocated memory is still 199.8 MB. Free memory was 177.7 MB in the beginning and 163.4 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4270.30 ms. Allocated memory was 199.8 MB in the beginning and 286.3 MB in the end (delta: 86.5 MB). Free memory was 162.7 MB in the beginning and 251.4 MB in the end (delta: -88.8 MB). Peak memory consumption was 123.9 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: 17]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 16, TraceHistogramMax: 12, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 505 SDslu, 593 SDs, 0 SdLazy, 1177 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 94 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 51 NumberOfFragments, 23 HoareAnnotationTreeSize, 23 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 455 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 439 ConstructedInterpolants, 0 QuantifiedInterpolants, 28428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 328/836 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...