/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:50:25,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:50:25,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:50:25,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:50:25,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:50:25,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:50:25,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:50:25,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:50:25,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:50:25,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:50:25,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:50:25,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:50:25,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:50:25,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:50:25,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:50:25,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:50:25,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:50:25,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:50:25,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:50:25,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:50:25,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:50:25,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:50:25,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:50:25,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:50:25,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:50:25,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:50:25,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:50:25,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:50:25,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:50:25,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:50:25,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:50:25,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:50:25,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:50:25,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:50:25,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:50:25,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:50:25,429 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 [2020-08-18 18:50:25,474 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:50:25,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:50:25,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:50:25,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:50:25,476 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:50:25,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:50:25,479 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:50:25,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:50:25,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:50:25,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:50:25,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:50:25,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:50:25,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:50:25,480 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:50:25,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:50:25,481 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:50:25,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:50:25,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:50:25,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:50:25,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:50:25,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:50:25,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:50:25,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:50:25,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:50:25,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:50:25,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:50:25,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:50:25,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:50:25,487 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:50:25,487 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:50:25,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:50:25,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:50:25,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:50:25,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:50:25,848 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:50:25,848 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-08-18 18:50:25,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/871fc61d0/4b53b09f77dc4a65aeab0e23ce42184c/FLAG5462e1773 [2020-08-18 18:50:26,322 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:50:26,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-08-18 18:50:26,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/871fc61d0/4b53b09f77dc4a65aeab0e23ce42184c/FLAG5462e1773 [2020-08-18 18:50:26,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/871fc61d0/4b53b09f77dc4a65aeab0e23ce42184c [2020-08-18 18:50:26,719 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:50:26,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:50:26,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:50:26,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:50:26,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:50:26,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:50:26" (1/1) ... [2020-08-18 18:50:26,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cee4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:26, skipping insertion in model container [2020-08-18 18:50:26,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:50:26" (1/1) ... [2020-08-18 18:50:26,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:50:26,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:50:27,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:50:27,035 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:50:27,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:50:27,088 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:50:27,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27 WrapperNode [2020-08-18 18:50:27,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:50:27,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:50:27,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:50:27,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:50:27,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (1/1) ... [2020-08-18 18:50:27,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (1/1) ... [2020-08-18 18:50:27,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (1/1) ... [2020-08-18 18:50:27,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (1/1) ... [2020-08-18 18:50:27,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (1/1) ... [2020-08-18 18:50:27,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (1/1) ... [2020-08-18 18:50:27,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (1/1) ... [2020-08-18 18:50:27,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:50:27,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:50:27,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:50:27,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:50:27,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (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 [2020-08-18 18:50:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:50:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:50:27,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 18:50:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:50:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:50:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:50:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 18:50:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 18:50:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:50:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 18:50:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:50:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:50:27,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:50:27,507 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:50:27,507 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:50:27,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:50:27 BoogieIcfgContainer [2020-08-18 18:50:27,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:50:27,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:50:27,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:50:27,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:50:27,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:50:26" (1/3) ... [2020-08-18 18:50:27,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618d796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:50:27, skipping insertion in model container [2020-08-18 18:50:27,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:50:27" (2/3) ... [2020-08-18 18:50:27,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618d796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:50:27, skipping insertion in model container [2020-08-18 18:50:27,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:50:27" (3/3) ... [2020-08-18 18:50:27,521 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-08-18 18:50:27,533 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:50:27,540 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:50:27,574 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:50:27,638 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:50:27,639 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:50:27,642 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:50:27,642 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:50:27,642 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:50:27,642 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:50:27,643 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:50:27,643 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:50:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-18 18:50:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 18:50:27,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:27,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:27,686 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:27,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:27,693 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-08-18 18:50:27,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:27,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360392425] [2020-08-18 18:50:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:27,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:27,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360392425] [2020-08-18 18:50:27,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:27,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:50:27,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73778535] [2020-08-18 18:50:27,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:50:27,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:50:27,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:50:27,884 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-18 18:50:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:27,946 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-08-18 18:50:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:50:27,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-18 18:50:27,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:27,958 INFO L225 Difference]: With dead ends: 37 [2020-08-18 18:50:27,959 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 18:50:27,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:50:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 18:50:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 18:50:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 18:50:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-08-18 18:50:28,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-08-18 18:50:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:28,004 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-08-18 18:50:28,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:50:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-08-18 18:50:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 18:50:28,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:28,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:28,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:50:28,006 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash 309875524, now seen corresponding path program 1 times [2020-08-18 18:50:28,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:28,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640858077] [2020-08-18 18:50:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:28,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:28,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640858077] [2020-08-18 18:50:28,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:28,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:50:28,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984491469] [2020-08-18 18:50:28,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:50:28,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:50:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:28,408 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 7 states. [2020-08-18 18:50:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:32,791 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-08-18 18:50:32,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:50:32,792 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-18 18:50:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:32,794 INFO L225 Difference]: With dead ends: 28 [2020-08-18 18:50:32,794 INFO L226 Difference]: Without dead ends: 23 [2020-08-18 18:50:32,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-18 18:50:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-18 18:50:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-08-18 18:50:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-18 18:50:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-08-18 18:50:32,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-08-18 18:50:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:32,804 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-08-18 18:50:32,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:50:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-08-18 18:50:32,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 18:50:32,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:32,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:32,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:50:32,806 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-08-18 18:50:32,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:32,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293264981] [2020-08-18 18:50:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:33,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:33,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293264981] [2020-08-18 18:50:33,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:33,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 18:50:33,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618977781] [2020-08-18 18:50:33,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 18:50:33,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 18:50:33,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:50:33,510 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 13 states. [2020-08-18 18:50:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:36,040 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2020-08-18 18:50:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:50:36,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-18 18:50:36,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:36,042 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:50:36,043 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:50:36,043 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 [2020-08-18 18:50:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:50:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-08-18 18:50:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 18:50:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-08-18 18:50:36,055 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-08-18 18:50:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:36,056 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-08-18 18:50:36,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 18:50:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-08-18 18:50:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 18:50:36,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:36,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:36,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:50:36,060 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash -162414684, now seen corresponding path program 2 times [2020-08-18 18:50:36,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:36,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819514898] [2020-08-18 18:50:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:36,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:36,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819514898] [2020-08-18 18:50:36,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:36,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:50:36,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281098541] [2020-08-18 18:50:36,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:50:36,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:50:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:50:36,461 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 8 states. [2020-08-18 18:50:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:36,814 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2020-08-18 18:50:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:50:36,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-08-18 18:50:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:36,816 INFO L225 Difference]: With dead ends: 38 [2020-08-18 18:50:36,816 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 18:50:36,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-08-18 18:50:36,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 18:50:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2020-08-18 18:50:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 18:50:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-08-18 18:50:36,831 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2020-08-18 18:50:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:36,831 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-08-18 18:50:36,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:50:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-08-18 18:50:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:50:36,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:36,832 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:36,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:50:36,833 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash -444322542, now seen corresponding path program 1 times [2020-08-18 18:50:36,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:36,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457317846] [2020-08-18 18:50:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:36,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:36,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457317846] [2020-08-18 18:50:36,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:36,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:50:36,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163214715] [2020-08-18 18:50:36,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:50:36,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:36,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:50:36,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:50:36,973 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-08-18 18:50:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:37,088 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-08-18 18:50:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:50:37,089 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 18:50:37,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:37,090 INFO L225 Difference]: With dead ends: 38 [2020-08-18 18:50:37,090 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 18:50:37,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:37,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 18:50:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-08-18 18:50:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 18:50:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-08-18 18:50:37,102 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2020-08-18 18:50:37,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:37,105 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-08-18 18:50:37,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:50:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-08-18 18:50:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:50:37,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:37,106 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:37,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:50:37,107 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash -450980439, now seen corresponding path program 1 times [2020-08-18 18:50:37,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:37,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046102945] [2020-08-18 18:50:37,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:37,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:37,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046102945] [2020-08-18 18:50:37,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:37,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:50:37,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159966041] [2020-08-18 18:50:37,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:50:37,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:50:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:50:37,498 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-08-18 18:50:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:39,802 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-08-18 18:50:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:50:39,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 18:50:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:39,805 INFO L225 Difference]: With dead ends: 37 [2020-08-18 18:50:39,805 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:50:39,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:50:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:50:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-08-18 18:50:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-18 18:50:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-08-18 18:50:39,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2020-08-18 18:50:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:39,821 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-08-18 18:50:39,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:50:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-08-18 18:50:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:50:39,822 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:39,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:39,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:50:39,825 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash -514824137, now seen corresponding path program 1 times [2020-08-18 18:50:39,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:39,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660025741] [2020-08-18 18:50:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:39,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:39,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660025741] [2020-08-18 18:50:39,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:39,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:50:39,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114811904] [2020-08-18 18:50:39,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:50:39,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:39,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:50:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:50:39,951 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 5 states. [2020-08-18 18:50:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:40,064 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-08-18 18:50:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:50:40,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 18:50:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:40,066 INFO L225 Difference]: With dead ends: 38 [2020-08-18 18:50:40,066 INFO L226 Difference]: Without dead ends: 27 [2020-08-18 18:50:40,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-18 18:50:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-08-18 18:50:40,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:50:40,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 18:50:40,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 21 [2020-08-18 18:50:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:40,072 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 18:50:40,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:50:40,073 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 18:50:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 18:50:40,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:40,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:40,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:50:40,074 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1260183225, now seen corresponding path program 1 times [2020-08-18 18:50:40,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:40,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691996907] [2020-08-18 18:50:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:40,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:40,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691996907] [2020-08-18 18:50:40,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:40,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:50:40,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094546246] [2020-08-18 18:50:40,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 18:50:40,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 18:50:40,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-18 18:50:40,835 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 15 states. [2020-08-18 18:50:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:41,569 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-08-18 18:50:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:50:41,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-08-18 18:50:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:41,573 INFO L225 Difference]: With dead ends: 37 [2020-08-18 18:50:41,573 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 18:50:41,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:50:41,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 18:50:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-08-18 18:50:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 18:50:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-18 18:50:41,580 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 21 [2020-08-18 18:50:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:41,580 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-18 18:50:41,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 18:50:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-18 18:50:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 18:50:41,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:41,581 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:41,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:50:41,582 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 2 times [2020-08-18 18:50:41,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:41,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632132937] [2020-08-18 18:50:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:41,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:41,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632132937] [2020-08-18 18:50:41,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:41,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:50:41,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142414488] [2020-08-18 18:50:41,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:50:41,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:41,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:50:41,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:50:41,743 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-18 18:50:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:43,985 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-08-18 18:50:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:50:43,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-18 18:50:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:43,986 INFO L225 Difference]: With dead ends: 41 [2020-08-18 18:50:43,986 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 18:50:43,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:50:43,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 18:50:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-18 18:50:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 18:50:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-18 18:50:43,993 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2020-08-18 18:50:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:43,994 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-18 18:50:43,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:50:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-18 18:50:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 18:50:43,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:43,995 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:43,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:50:43,995 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1961236154, now seen corresponding path program 1 times [2020-08-18 18:50:43,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:43,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634727266] [2020-08-18 18:50:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:44,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:44,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634727266] [2020-08-18 18:50:44,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:44,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:50:44,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890569080] [2020-08-18 18:50:44,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:50:44,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:44,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:50:44,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:50:44,130 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 6 states. [2020-08-18 18:50:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:44,289 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-08-18 18:50:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:50:44,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-18 18:50:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:44,290 INFO L225 Difference]: With dead ends: 44 [2020-08-18 18:50:44,291 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 18:50:44,291 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 [2020-08-18 18:50:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 18:50:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-08-18 18:50:44,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 18:50:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 18:50:44,303 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2020-08-18 18:50:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:44,304 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 18:50:44,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:50:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 18:50:44,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 18:50:44,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:44,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:44,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:50:44,309 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:44,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:44,310 INFO L82 PathProgramCache]: Analyzing trace with hash -230662155, now seen corresponding path program 1 times [2020-08-18 18:50:44,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:44,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233859830] [2020-08-18 18:50:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:48,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:50:48,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233859830] [2020-08-18 18:50:48,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:50:48,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:50:48,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658406168] [2020-08-18 18:50:48,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:50:48,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:48,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:50:48,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-18 18:50:48,641 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-08-18 18:50:49,178 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2020-08-18 18:50:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:57,780 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2020-08-18 18:50:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:50:57,781 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-08-18 18:50:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:57,782 INFO L225 Difference]: With dead ends: 43 [2020-08-18 18:50:57,783 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 18:50:57,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=28, Invalid=61, Unknown=1, NotChecked=0, Total=90 [2020-08-18 18:50:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 18:50:57,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-18 18:50:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-18 18:50:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-18 18:50:57,793 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2020-08-18 18:50:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:57,793 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-18 18:50:57,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:50:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-18 18:50:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:50:57,794 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:50:57,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:50:57,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 18:50:57,795 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:50:57,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:50:57,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-08-18 18:50:57,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:50:57,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438431121] [2020-08-18 18:50:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:50:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:50:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:50:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 18:50:57,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438431121] [2020-08-18 18:50:57,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:50:57,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 18:50:57,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993391481] [2020-08-18 18:50:57,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:50:57,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:50:57,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:50:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:50:57,918 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-08-18 18:50:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:50:58,022 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-08-18 18:50:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:50:58,023 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-18 18:50:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:50:58,023 INFO L225 Difference]: With dead ends: 31 [2020-08-18 18:50:58,023 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:50:58,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:50:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:50:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:50:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:50:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:50:58,025 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-18 18:50:58,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:50:58,025 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:50:58,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:50:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:50:58,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:50:58,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 18:50:58,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:50:58,170 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:50:58,170 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-18 18:50:58,171 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:50:58,172 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:50:58,172 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-18 18:50:58,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:50:58,172 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:50:58,172 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:50:58,173 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 18:50:58,173 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:50:58,173 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 18:50:58,173 INFO L268 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-08-18 18:50:58,173 INFO L268 CegarLoopResult]: For program point L27(lines 27 30) no Hoare annotation was computed. [2020-08-18 18:50:58,173 INFO L268 CegarLoopResult]: For program point L25(lines 25 30) no Hoare annotation was computed. [2020-08-18 18:50:58,173 INFO L268 CegarLoopResult]: For program point L27-2(lines 21 30) no Hoare annotation was computed. [2020-08-18 18:50:58,174 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 35) no Hoare annotation was computed. [2020-08-18 18:50:58,174 INFO L268 CegarLoopResult]: For program point L23(lines 23 30) no Hoare annotation was computed. [2020-08-18 18:50:58,174 INFO L268 CegarLoopResult]: For program point L21(lines 21 30) no Hoare annotation was computed. [2020-08-18 18:50:58,174 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 32) the Hoare annotation is: (or (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0))) (and (<= main_~l~0 .cse0) (<= .cse0 main_~l~0))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-18 18:50:58,174 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 32) the Hoare annotation is: (or (let ((.cse1 (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0 (* 4294967296 (div main_~l~0 4294967296)))) (.cse0 (* 4294967296 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v3~0 main_~v4~0) 4294967296)))) (and (<= (+ main_~l~0 .cse0) .cse1) (< .cse1 (+ main_~l~0 .cse0 1)))) (not (<= ~SIZE~0 20000001)) (not (<= 20000001 ~SIZE~0))) [2020-08-18 18:50:58,177 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 35) no Hoare annotation was computed. [2020-08-18 18:50:58,177 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 35) the Hoare annotation is: true [2020-08-18 18:50:58,177 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-18 18:50:58,177 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 18:50:58,178 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 18:50:58,178 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 18:50:58,178 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 18:50:58,178 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 18:50:58,178 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 18:50:58,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:50:58 BoogieIcfgContainer [2020-08-18 18:50:58,197 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:50:58,200 INFO L168 Benchmark]: Toolchain (without parser) took 31478.98 ms. Allocated memory was 137.4 MB in the beginning and 283.6 MB in the end (delta: 146.3 MB). Free memory was 100.7 MB in the beginning and 111.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 135.3 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:58,201 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:50:58,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.74 ms. Allocated memory is still 137.4 MB. Free memory was 100.5 MB in the beginning and 90.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:58,202 INFO L168 Benchmark]: Boogie Preprocessor took 134.83 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 90.6 MB in the beginning and 177.6 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:58,203 INFO L168 Benchmark]: RCFGBuilder took 285.73 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 162.7 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:58,204 INFO L168 Benchmark]: TraceAbstraction took 30684.71 ms. Allocated memory was 199.8 MB in the beginning and 283.6 MB in the end (delta: 83.9 MB). Free memory was 162.7 MB in the beginning and 111.7 MB in the end (delta: 51.0 MB). Peak memory consumption was 134.9 MB. Max. memory is 7.1 GB. [2020-08-18 18:50:58,207 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 365.74 ms. Allocated memory is still 137.4 MB. Free memory was 100.5 MB in the beginning and 90.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.83 ms. Allocated memory was 137.4 MB in the beginning and 199.8 MB in the end (delta: 62.4 MB). Free memory was 90.6 MB in the beginning and 177.6 MB in the end (delta: -87.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 285.73 ms. Allocated memory is still 199.8 MB. Free memory was 177.6 MB in the beginning and 162.7 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 30684.71 ms. Allocated memory was 199.8 MB in the beginning and 283.6 MB in the end (delta: 83.9 MB). Free memory was 162.7 MB in the beginning and 111.7 MB in the end (delta: 51.0 MB). Peak memory consumption was 134.9 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: ((l <= i + j + k + v3 + v4 && i + j + k + v3 + v4 <= l) || !(SIZE <= 20000001)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 30.3s, OverallIterations: 12, TraceHistogramMax: 3, AutomataDifference: 22.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 513 SDslu, 243 SDs, 0 SdLazy, 778 SolverSat, 128 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 19.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 32 SyntacticMatches, 12 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=11, 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, 12 MinimizatonAttempts, 26 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 19 PreInvPairs, 27 NumberOfFragments, 98 HoareAnnotationTreeSize, 19 FomulaSimplifications, 533 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 248 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 240 NumberOfCodeBlocks, 240 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 228 ConstructedInterpolants, 0 QuantifiedInterpolants, 52122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 3 PerfectInterpolantSequences, 42/80 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...