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 -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:05:19,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:05:19,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:05:19,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 13:05:19,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 13:05:19,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 13:05:19,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 13:05:19,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 13:05:19,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 13:05:19,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 13:05:19,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 13:05:19,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 13:05:19,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 13:05:19,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 13:05:19,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 13:05:19,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 13:05:19,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 13:05:19,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 13:05:19,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 13:05:19,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 13:05:19,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 13:05:19,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 13:05:19,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 13:05:19,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 13:05:19,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-05 13:05:19,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-05 13:05:19,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-05 13:05:19,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-05 13:05:19,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-05 13:05:19,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-05 13:05:19,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 13:05:19,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 13:05:19,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 13:05:19,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 13:05:19,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 13:05:19,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 13:05:19,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 13:05:19,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 13:05:19,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 13:05:19,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 13:05:19,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 13:05:19,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-05 13:05:19,808 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:05:19,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:05:19,809 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:05:19,809 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:05:19,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:05:19,811 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:05:19,811 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:05:19,811 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:05:19,811 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:05:19,811 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:05:19,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:05:19,812 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:05:19,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:05:19,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:05:19,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:05:19,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:05:19,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:05:19,814 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:05:19,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:05:19,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:05:19,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:05:19,815 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:05:19,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:05:19,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:05:19,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:05:19,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:05:19,817 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:05:19,817 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:05:19,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:05:19,819 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:05:19,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:05:19,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:05:19,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:05:19,876 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:05:19,878 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:05:19,879 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2019-09-05 13:05:19,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfeecf7b9/df8e696ebc1242efb0a35127985c3552/FLAG1397190e4 [2019-09-05 13:05:20,405 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:05:20,406 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2019-09-05 13:05:20,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfeecf7b9/df8e696ebc1242efb0a35127985c3552/FLAG1397190e4 [2019-09-05 13:05:20,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfeecf7b9/df8e696ebc1242efb0a35127985c3552 [2019-09-05 13:05:20,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:05:20,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:05:20,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:05:20,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:05:20,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:05:20,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:05:20" (1/1) ... [2019-09-05 13:05:20,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250219f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:20, skipping insertion in model container [2019-09-05 13:05:20,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:05:20" (1/1) ... [2019-09-05 13:05:20,816 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:05:20,832 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:05:20,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:05:20,986 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:05:21,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:05:21,024 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:05:21,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21 WrapperNode [2019-09-05 13:05:21,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:05:21,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:05:21,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:05:21,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:05:21,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... [2019-09-05 13:05:21,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... [2019-09-05 13:05:21,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... [2019-09-05 13:05:21,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... [2019-09-05 13:05:21,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... [2019-09-05 13:05:21,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... [2019-09-05 13:05:21,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... [2019-09-05 13:05:21,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:05:21,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:05:21,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:05:21,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:05:21,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-09-05 13:05:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:05:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:05:21,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 13:05:21,212 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:05:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:05:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:05:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:05:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 13:05:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:05:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:05:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:05:21,401 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:05:21,402 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 13:05:21,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:05:21 BoogieIcfgContainer [2019-09-05 13:05:21,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:05:21,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:05:21,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:05:21,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:05:21,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:05:20" (1/3) ... [2019-09-05 13:05:21,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24128460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:05:21, skipping insertion in model container [2019-09-05 13:05:21,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:05:21" (2/3) ... [2019-09-05 13:05:21,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24128460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:05:21, skipping insertion in model container [2019-09-05 13:05:21,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:05:21" (3/3) ... [2019-09-05 13:05:21,431 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2019-09-05 13:05:21,454 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:05:21,467 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:05:21,504 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:05:21,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:05:21,539 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:05:21,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:05:21,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:05:21,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:05:21,540 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:05:21,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:05:21,540 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:05:21,554 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-05 13:05:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 13:05:21,564 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:05:21,565 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:05:21,567 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:05:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:05:21,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1912775084, now seen corresponding path program 1 times [2019-09-05 13:05:21,574 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:05:21,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:21,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:05:21,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:21,612 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:05:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:05:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:21,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:05:21,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 13:05:21,677 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:05:21,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 13:05:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 13:05:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:05:21,694 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-05 13:05:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:05:21,707 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-09-05 13:05:21,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 13:05:21,708 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-05 13:05:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:05:21,716 INFO L225 Difference]: With dead ends: 20 [2019-09-05 13:05:21,716 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 13:05:21,718 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:05:21,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 13:05:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 13:05:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 13:05:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 13:05:21,748 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2019-09-05 13:05:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:05:21,748 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 13:05:21,748 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 13:05:21,748 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 13:05:21,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 13:05:21,749 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:05:21,749 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:05:21,750 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:05:21,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:05:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2027291688, now seen corresponding path program 1 times [2019-09-05 13:05:21,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:05:21,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:21,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:05:21,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:21,752 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:05:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:05:22,045 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2019-09-05 13:05:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:22,168 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:05:22,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-05 13:05:22,169 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:05:22,171 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 13:05:22,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 13:05:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 13:05:22,172 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-09-05 13:05:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:05:22,340 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-05 13:05:22,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 13:05:22,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-09-05 13:05:22,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:05:22,342 INFO L225 Difference]: With dead ends: 18 [2019-09-05 13:05:22,343 INFO L226 Difference]: Without dead ends: 14 [2019-09-05 13:05:22,344 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:05:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-05 13:05:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-05 13:05:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 13:05:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 13:05:22,349 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-05 13:05:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:05:22,350 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 13:05:22,350 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 13:05:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 13:05:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 13:05:22,351 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:05:22,351 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:05:22,351 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:05:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:05:22,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1190399537, now seen corresponding path program 1 times [2019-09-05 13:05:22,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:05:22,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:22,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:05:22,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:22,354 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:05:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:05:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:22,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:05:22,551 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:05:22,552 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-05 13:05:22,554 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [15], [17], [23], [30], [33], [35], [41], [42], [43], [45] [2019-09-05 13:05:22,591 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:05:22,591 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:05:22,798 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:05:22,813 INFO L272 AbstractInterpreter]: Visited 13 different actions 41 times. Merged at 3 different actions 12 times. Widened at 1 different actions 2 times. Performed 116 root evaluator evaluations with a maximum evaluation depth of 5. Performed 116 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-09-05 13:05:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:05:22,818 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:05:22,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:05:22,819 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:05:22,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:05:22,835 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:05:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:05:22,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-05 13:05:22,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:05:22,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:05:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:22,975 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:05:23,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:23,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 13:05:23,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2019-09-05 13:05:23,066 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:05:23,067 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 13:05:23,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 13:05:23,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-09-05 13:05:23,069 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2019-09-05 13:05:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:05:23,195 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-05 13:05:23,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 13:05:23,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2019-09-05 13:05:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:05:23,197 INFO L225 Difference]: With dead ends: 19 [2019-09-05 13:05:23,197 INFO L226 Difference]: Without dead ends: 15 [2019-09-05 13:05:23,198 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-09-05 13:05:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-05 13:05:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-05 13:05:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 13:05:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-05 13:05:23,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-05 13:05:23,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:05:23,204 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-05 13:05:23,204 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 13:05:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-05 13:05:23,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 13:05:23,205 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:05:23,205 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:05:23,206 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:05:23,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:05:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1016546632, now seen corresponding path program 2 times [2019-09-05 13:05:23,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:05:23,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:23,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:05:23,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:23,209 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:05:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:05:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:23,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:05:23,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:05:23,393 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:05:23,394 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:05:23,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:05:23,394 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:05:23,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 13:05:23,408 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:05:23,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 13:05:23,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:05:23,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 13:05:23,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:05:23,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:05:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:23,525 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:05:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:23,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 13:05:23,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2019-09-05 13:05:23,653 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:05:23,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:05:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:05:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-09-05 13:05:23,655 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2019-09-05 13:05:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:05:23,829 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-09-05 13:05:23,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 13:05:23,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-09-05 13:05:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:05:23,831 INFO L225 Difference]: With dead ends: 23 [2019-09-05 13:05:23,831 INFO L226 Difference]: Without dead ends: 17 [2019-09-05 13:05:23,832 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2019-09-05 13:05:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-05 13:05:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-05 13:05:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-05 13:05:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-05 13:05:23,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-09-05 13:05:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:05:23,836 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-05 13:05:23,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:05:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-05 13:05:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 13:05:23,837 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:05:23,837 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:05:23,838 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:05:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:05:23,838 INFO L82 PathProgramCache]: Analyzing trace with hash -353156712, now seen corresponding path program 3 times [2019-09-05 13:05:23,838 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:05:23,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:23,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:05:23,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:05:23,840 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:05:23,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:05:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 13:05:24,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:05:24,087 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:05:24,088 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:05:24,088 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:05:24,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:05:24,088 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:05:24,101 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 13:05:24,102 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:05:24,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 13:05:24,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:05:24,113 WARN L254 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-05 13:05:24,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:05:24,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:05:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:24,236 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:05:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:05:24,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 13:05:24,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2019-09-05 13:05:24,494 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:05:24,494 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 13:05:24,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 13:05:24,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2019-09-05 13:05:24,495 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2019-09-05 13:05:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:05:24,637 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-09-05 13:05:24,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 13:05:24,637 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-09-05 13:05:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:05:24,638 INFO L225 Difference]: With dead ends: 18 [2019-09-05 13:05:24,638 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:05:24,639 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2019-09-05 13:05:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:05:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:05:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:05:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:05:24,640 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-09-05 13:05:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:05:24,640 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:05:24,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 13:05:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:05:24,641 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:05:24,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:05:24 BoogieIcfgContainer [2019-09-05 13:05:24,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:05:24,648 INFO L168 Benchmark]: Toolchain (without parser) took 3850.88 ms. Allocated memory was 131.6 MB in the beginning and 264.8 MB in the end (delta: 133.2 MB). Free memory was 88.0 MB in the beginning and 158.1 MB in the end (delta: -70.1 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. [2019-09-05 13:05:24,649 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 131.6 MB. Free memory was 105.9 MB in the beginning and 105.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:05:24,650 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.04 ms. Allocated memory is still 131.6 MB. Free memory was 87.8 MB in the beginning and 78.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-05 13:05:24,651 INFO L168 Benchmark]: Boogie Preprocessor took 128.79 ms. Allocated memory was 131.6 MB in the beginning and 199.2 MB in the end (delta: 67.6 MB). Free memory was 78.6 MB in the beginning and 175.7 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2019-09-05 13:05:24,652 INFO L168 Benchmark]: RCFGBuilder took 254.39 ms. Allocated memory is still 199.2 MB. Free memory was 175.7 MB in the beginning and 164.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-05 13:05:24,653 INFO L168 Benchmark]: TraceAbstraction took 3235.32 ms. Allocated memory was 199.2 MB in the beginning and 264.8 MB in the end (delta: 65.5 MB). Free memory was 164.4 MB in the beginning and 158.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 71.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:05:24,657 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 131.6 MB. Free memory was 105.9 MB in the beginning and 105.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.04 ms. Allocated memory is still 131.6 MB. Free memory was 87.8 MB in the beginning and 78.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.79 ms. Allocated memory was 131.6 MB in the beginning and 199.2 MB in the end (delta: 67.6 MB). Free memory was 78.6 MB in the beginning and 175.7 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 254.39 ms. Allocated memory is still 199.2 MB. Free memory was 175.7 MB in the beginning and 164.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3235.32 ms. Allocated memory was 199.2 MB in the beginning and 264.8 MB in the end (delta: 65.5 MB). Free memory was 164.4 MB in the beginning and 158.1 MB in the end (delta: 6.3 MB). Peak memory consumption was 71.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 31 SDslu, 176 SDs, 0 SdLazy, 208 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 110 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 11716 SizeOfPredicates, 21 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 1/42 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...