/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 17:29:16,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:29:16,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:29:16,460 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:29:16,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:29:16,462 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:29:16,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:29:16,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:29:16,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:29:16,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:29:16,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:29:16,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:29:16,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:29:16,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:29:16,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:29:16,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:29:16,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:29:16,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:29:16,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:29:16,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:29:16,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:29:16,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:29:16,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:29:16,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:29:16,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 17:29:16,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:29:16,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:29:16,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:29:16,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 17:29:16,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:29:16,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:29:16,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:29:16,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:29:16,519 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:29:16,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:29:16,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:29:16,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:29:16,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:29:16,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:29:16,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:29:16,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:29:16,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:29:16,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:29:16,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:29:16,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:29:16,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:29:16,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:29:16,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:29:16,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:29:16,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:29:16,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:29:16,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:29:16,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:29:16,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:29:16,523 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:29:16,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:29:16,523 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:29:16,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:29:16,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:29:16,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:29:16,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:29:16,902 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:29:16,907 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:29:16,907 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:29:16,908 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-21 17:29:16,975 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78eb85790/91fde664abbb47a39438f88111abfd2c/FLAG8f461131a [2020-08-21 17:29:17,404 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:29:17,405 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-21 17:29:17,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78eb85790/91fde664abbb47a39438f88111abfd2c/FLAG8f461131a [2020-08-21 17:29:17,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78eb85790/91fde664abbb47a39438f88111abfd2c [2020-08-21 17:29:17,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:29:17,765 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:29:17,766 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:29:17,766 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:29:17,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:29:17,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:29:17" (1/1) ... [2020-08-21 17:29:17,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5e3f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:17, skipping insertion in model container [2020-08-21 17:29:17,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:29:17" (1/1) ... [2020-08-21 17:29:17,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:29:17,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:29:18,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:29:18,039 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:29:18,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:29:18,072 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:29:18,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18 WrapperNode [2020-08-21 17:29:18,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:29:18,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:29:18,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:29:18,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:29:18,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... [2020-08-21 17:29:18,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... [2020-08-21 17:29:18,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... [2020-08-21 17:29:18,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... [2020-08-21 17:29:18,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... [2020-08-21 17:29:18,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... [2020-08-21 17:29:18,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... [2020-08-21 17:29:18,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:29:18,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:29:18,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:29:18,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:29:18,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:29:18,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:29:18,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:29:18,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 17:29:18,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 17:29:18,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:29:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:29:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 17:29:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 17:29:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 17:29:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:29:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:29:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:29:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:29:18,484 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:29:18,484 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 17:29:18,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:29:18 BoogieIcfgContainer [2020-08-21 17:29:18,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:29:18,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:29:18,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:29:18,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:29:18,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:29:17" (1/3) ... [2020-08-21 17:29:18,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afe3b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:29:18, skipping insertion in model container [2020-08-21 17:29:18,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:29:18" (2/3) ... [2020-08-21 17:29:18,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afe3b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:29:18, skipping insertion in model container [2020-08-21 17:29:18,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:29:18" (3/3) ... [2020-08-21 17:29:18,498 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-08-21 17:29:18,509 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:29:18,518 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:29:18,533 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:29:18,559 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:29:18,559 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:29:18,559 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:29:18,559 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:29:18,559 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:29:18,560 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:29:18,560 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:29:18,560 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:29:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-21 17:29:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 17:29:18,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:18,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:18,587 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-08-21 17:29:18,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:18,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634003003] [2020-08-21 17:29:18,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:19,183 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-08-21 17:29:19,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:19,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634003003] [2020-08-21 17:29:19,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:19,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:29:19,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856671323] [2020-08-21 17:29:19,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:29:19,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:19,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:29:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:29:19,275 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-08-21 17:29:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:21,651 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-08-21 17:29:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:29:21,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-21 17:29:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:21,664 INFO L225 Difference]: With dead ends: 49 [2020-08-21 17:29:21,664 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 17:29:21,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:29:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 17:29:21,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-08-21 17:29:21,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 17:29:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-08-21 17:29:21,713 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-08-21 17:29:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:21,714 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-08-21 17:29:21,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:29:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-08-21 17:29:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 17:29:21,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:21,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:21,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:29:21,717 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:21,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:21,717 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-08-21 17:29:21,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:21,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749764943] [2020-08-21 17:29:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:22,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:22,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749764943] [2020-08-21 17:29:22,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:22,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:29:22,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767379385] [2020-08-21 17:29:22,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:29:22,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:22,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:29:22,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:29:22,393 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 13 states. [2020-08-21 17:29:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:22,868 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2020-08-21 17:29:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:29:22,869 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-21 17:29:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:22,870 INFO L225 Difference]: With dead ends: 37 [2020-08-21 17:29:22,871 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 17:29:22,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-08-21 17:29:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 17:29:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-08-21 17:29:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 17:29:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-08-21 17:29:22,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-08-21 17:29:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:22,891 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-08-21 17:29:22,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:29:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-08-21 17:29:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:29:22,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:22,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:22,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:29:22,897 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash 117019209, now seen corresponding path program 2 times [2020-08-21 17:29:22,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:22,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829812836] [2020-08-21 17:29:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:23,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:23,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829812836] [2020-08-21 17:29:23,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:23,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 17:29:23,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712306192] [2020-08-21 17:29:23,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:29:23,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:29:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:29:23,101 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-08-21 17:29:23,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:23,214 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-08-21 17:29:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:29:23,215 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-21 17:29:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:23,217 INFO L225 Difference]: With dead ends: 35 [2020-08-21 17:29:23,217 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 17:29:23,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:29:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 17:29:23,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-21 17:29:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 17:29:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-21 17:29:23,231 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-08-21 17:29:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:23,231 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-21 17:29:23,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:29:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-21 17:29:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 17:29:23,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:23,234 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:23,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:29:23,234 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash -367783497, now seen corresponding path program 1 times [2020-08-21 17:29:23,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:23,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075257139] [2020-08-21 17:29:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:23,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:23,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075257139] [2020-08-21 17:29:23,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:23,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 17:29:23,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731945449] [2020-08-21 17:29:23,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:29:23,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:29:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:29:23,417 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-21 17:29:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:25,645 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-21 17:29:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:29:25,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-21 17:29:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:25,649 INFO L225 Difference]: With dead ends: 34 [2020-08-21 17:29:25,650 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 17:29:25,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:29:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 17:29:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-21 17:29:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 17:29:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-21 17:29:25,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-08-21 17:29:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:25,662 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-21 17:29:25,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:29:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-21 17:29:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:29:25,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:25,663 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:25,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:29:25,663 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1925752910, now seen corresponding path program 1 times [2020-08-21 17:29:25,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:25,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464769365] [2020-08-21 17:29:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:25,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464769365] [2020-08-21 17:29:25,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:25,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 17:29:25,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512912947] [2020-08-21 17:29:25,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:29:25,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:25,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:29:25,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:29:25,851 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-08-21 17:29:25,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:25,959 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-21 17:29:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:29:25,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 17:29:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:25,961 INFO L225 Difference]: With dead ends: 35 [2020-08-21 17:29:25,961 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 17:29:25,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:29:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 17:29:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-21 17:29:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 17:29:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-08-21 17:29:25,973 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-08-21 17:29:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:25,973 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-08-21 17:29:25,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:29:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-08-21 17:29:25,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:29:25,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:25,975 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:25,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:29:25,976 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:25,976 INFO L82 PathProgramCache]: Analyzing trace with hash -594207024, now seen corresponding path program 1 times [2020-08-21 17:29:25,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:25,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096281412] [2020-08-21 17:29:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:26,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:26,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096281412] [2020-08-21 17:29:26,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:26,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 17:29:26,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776793395] [2020-08-21 17:29:26,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 17:29:26,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:26,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 17:29:26,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:29:26,814 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 15 states. [2020-08-21 17:29:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:29,442 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-21 17:29:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 17:29:29,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-08-21 17:29:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:29,444 INFO L225 Difference]: With dead ends: 33 [2020-08-21 17:29:29,444 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 17:29:29,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-08-21 17:29:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 17:29:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 17:29:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 17:29:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 17:29:29,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-08-21 17:29:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:29,461 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 17:29:29,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 17:29:29,463 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 17:29:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 17:29:29,464 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:29,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:29,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:29:29,465 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:29,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 2 times [2020-08-21 17:29:29,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:29,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270322586] [2020-08-21 17:29:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:29,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:29,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270322586] [2020-08-21 17:29:29,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:29,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 17:29:29,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079159524] [2020-08-21 17:29:29,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:29:29,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:29:29,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:29:29,599 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-08-21 17:29:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:29,752 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-21 17:29:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:29:29,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-21 17:29:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:29,754 INFO L225 Difference]: With dead ends: 40 [2020-08-21 17:29:29,754 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 17:29:29,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:29:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 17:29:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-21 17:29:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 17:29:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-21 17:29:29,761 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-08-21 17:29:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:29,761 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-21 17:29:29,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:29:29,761 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-21 17:29:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 17:29:29,762 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:29,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:29,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:29:29,762 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:29,763 INFO L82 PathProgramCache]: Analyzing trace with hash 937388738, now seen corresponding path program 1 times [2020-08-21 17:29:29,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:29,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579684151] [2020-08-21 17:29:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:34,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:29:34,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579684151] [2020-08-21 17:29:34,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:29:34,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 17:29:34,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968742716] [2020-08-21 17:29:34,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:29:34,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:34,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:29:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-21 17:29:34,071 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-21 17:29:36,195 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 26 [2020-08-21 17:29:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:40,489 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-08-21 17:29:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:29:40,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-21 17:29:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:40,491 INFO L225 Difference]: With dead ends: 39 [2020-08-21 17:29:40,491 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 17:29:40,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2020-08-21 17:29:40,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 17:29:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-21 17:29:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 17:29:40,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-21 17:29:40,497 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-08-21 17:29:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:40,498 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-21 17:29:40,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:29:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-21 17:29:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 17:29:40,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:29:40,499 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:29:40,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:29:40,499 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:29:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:29:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-08-21 17:29:40,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:29:40,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938428809] [2020-08-21 17:29:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:29:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:29:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:29:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 17:29:40,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938428809] [2020-08-21 17:29:40,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:29:40,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:29:40,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37220295] [2020-08-21 17:29:40,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:29:40,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:29:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:29:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:29:40,628 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-08-21 17:29:40,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:29:40,726 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-08-21 17:29:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:29:40,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 17:29:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:29:40,729 INFO L225 Difference]: With dead ends: 28 [2020-08-21 17:29:40,729 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:29:40,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:29:40,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:29:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:29:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:29:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:29:40,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-21 17:29:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:29:40,732 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:29:40,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:29:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:29:40,732 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:29:40,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:29:40,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:29:40,862 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:29:40,863 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-21 17:29:40,863 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:29:40,863 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:29:40,863 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-21 17:29:40,863 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-08-21 17:29:40,864 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-08-21 17:29:40,865 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-08-21 17:29:40,865 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-08-21 17:29:40,865 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-08-21 17:29:40,865 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-21 17:29:40,865 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse1 (div main_~l~0 4294967296)) (.cse0 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296))) (let ((.cse3 (+ (* 4294967296 .cse0) main_~l~0)) (.cse2 (* 4294967296 .cse1))) (and (< .cse0 (+ .cse1 1)) (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2) .cse3) (< .cse3 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2 1))))) (not (<= 20000001 ~SIZE~0))) [2020-08-21 17:29:40,865 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-08-21 17:29:40,866 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-08-21 17:29:40,866 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-21 17:29:40,866 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 17:29:40,866 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 17:29:40,866 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 17:29:40,866 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 17:29:40,866 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 17:29:40,867 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 17:29:40,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:29:40 BoogieIcfgContainer [2020-08-21 17:29:40,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:29:40,887 INFO L168 Benchmark]: Toolchain (without parser) took 23122.63 ms. Allocated memory was 143.7 MB in the beginning and 262.1 MB in the end (delta: 118.5 MB). Free memory was 106.8 MB in the beginning and 172.9 MB in the end (delta: -66.1 MB). Peak memory consumption was 52.4 MB. Max. memory is 7.1 GB. [2020-08-21 17:29:40,888 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 17:29:40,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.30 ms. Allocated memory is still 143.7 MB. Free memory was 106.4 MB in the beginning and 96.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 17:29:40,890 INFO L168 Benchmark]: Boogie Preprocessor took 114.42 ms. Allocated memory was 143.7 MB in the beginning and 204.5 MB in the end (delta: 60.8 MB). Free memory was 96.8 MB in the beginning and 183.3 MB in the end (delta: -86.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:29:40,891 INFO L168 Benchmark]: RCFGBuilder took 300.56 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 169.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:29:40,892 INFO L168 Benchmark]: TraceAbstraction took 22395.63 ms. Allocated memory was 204.5 MB in the beginning and 262.1 MB in the end (delta: 57.7 MB). Free memory was 168.5 MB in the beginning and 172.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. [2020-08-21 17:29:40,896 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 125.2 MB in the beginning and 125.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.30 ms. Allocated memory is still 143.7 MB. Free memory was 106.4 MB in the beginning and 96.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.42 ms. Allocated memory was 143.7 MB in the beginning and 204.5 MB in the end (delta: 60.8 MB). Free memory was 96.8 MB in the beginning and 183.3 MB in the end (delta: -86.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.56 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 169.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22395.63 ms. Allocated memory was 204.5 MB in the beginning and 262.1 MB in the end (delta: 57.7 MB). Free memory was 168.5 MB in the beginning and 172.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 53.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (!(SIZE <= 20000001) || (i + j + k + v4 <= l && l <= i + j + k + v4)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.1s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 14.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 274 SDslu, 221 SDs, 0 SdLazy, 585 SolverSat, 85 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 11.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=8, 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, 9 MinimizatonAttempts, 18 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 24 NumberOfFragments, 105 HoareAnnotationTreeSize, 17 FomulaSimplifications, 488 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 92 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 35421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 33/60 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...