/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:28:41,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:28:41,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:28:41,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:28:41,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:28:41,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:28:41,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:28:41,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:28:41,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:28:41,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:28:41,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:28:41,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:28:41,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:28:41,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:28:41,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:28:41,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:28:41,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:28:41,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:28:41,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:28:41,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:28:41,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:28:41,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:28:41,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:28:41,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:28:41,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:28:41,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:28:41,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:28:41,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:28:41,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:28:41,569 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:28:41,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:28:41,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:28:41,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:28:41,571 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:28:41,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:28:41,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:28:41,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:28:41,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:28:41,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:28:41,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:28:41,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:28:41,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:28:41,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:28:41,573 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:28:41,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:28:41,573 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:28:41,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:28:41,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:28:41,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:28:41,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:28:41,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:28:41,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:28:41,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:28:41,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:28:41,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:28:41,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:28:41,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:28:41,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:28:41,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:28:41,847 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:28:41,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:28:41,862 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:28:41,863 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:28:41,864 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:28:41,864 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum.i [2019-11-23 22:28:41,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dd17b0e0/fa5174813c104c9b8364c98ec89f00d1/FLAGcc0848370 [2019-11-23 22:28:42,364 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:28:42,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum.i [2019-11-23 22:28:42,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dd17b0e0/fa5174813c104c9b8364c98ec89f00d1/FLAGcc0848370 [2019-11-23 22:28:42,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dd17b0e0/fa5174813c104c9b8364c98ec89f00d1 [2019-11-23 22:28:42,761 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:28:42,763 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:28:42,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:28:42,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:28:42,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:28:42,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:42" (1/1) ... [2019-11-23 22:28:42,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e90e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:42, skipping insertion in model container [2019-11-23 22:28:42,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:28:42" (1/1) ... [2019-11-23 22:28:42,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:28:42,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:28:43,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:28:43,011 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:28:43,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:28:43,049 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:28:43,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43 WrapperNode [2019-11-23 22:28:43,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:28:43,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:28:43,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:28:43,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:28:43,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:28:43,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:28:43,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:28:43,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:28:43,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (1/1) ... [2019-11-23 22:28:43,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:28:43,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:28:43,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:28:43,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:28:43,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (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 [2019-11-23 22:28:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:28:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:28:43,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:28:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:28:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:28:43,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:28:43,599 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:28:43,600 INFO L284 CfgBuilder]: Removed 14 assume(true) statements. [2019-11-23 22:28:43,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:43 BoogieIcfgContainer [2019-11-23 22:28:43,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:28:43,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:28:43,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:28:43,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:28:43,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:28:42" (1/3) ... [2019-11-23 22:28:43,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493d1cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:43, skipping insertion in model container [2019-11-23 22:28:43,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:28:43" (2/3) ... [2019-11-23 22:28:43,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@493d1cdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:28:43, skipping insertion in model container [2019-11-23 22:28:43,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:28:43" (3/3) ... [2019-11-23 22:28:43,621 INFO L109 eAbstractionObserver]: Analyzing ICFG sum.i [2019-11-23 22:28:43,643 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:28:43,651 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:28:43,663 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:28:43,684 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:28:43,685 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:28:43,685 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:28:43,685 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:28:43,685 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:28:43,685 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:28:43,685 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:28:43,686 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:28:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 22:28:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:28:43,705 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:43,706 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:43,706 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1309903528, now seen corresponding path program 1 times [2019-11-23 22:28:43,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:43,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409884460] [2019-11-23 22:28:43,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:28:43,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409884460] [2019-11-23 22:28:43,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:43,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:28:43,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050952004] [2019-11-23 22:28:43,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:28:43,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:43,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:28:43,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:28:43,870 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-23 22:28:43,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:43,890 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2019-11-23 22:28:43,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:28:43,891 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-11-23 22:28:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:43,901 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:28:43,901 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:28:43,905 INFO L630 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 [2019-11-23 22:28:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:28:43,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 22:28:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:28:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-23 22:28:43,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2019-11-23 22:28:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:43,940 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-23 22:28:43,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:28:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-23 22:28:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:28:43,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:43,942 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:43,942 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1075619486, now seen corresponding path program 1 times [2019-11-23 22:28:43,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:43,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424669280] [2019-11-23 22:28:43,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:28:44,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424669280] [2019-11-23 22:28:44,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:44,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:28:44,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330995583] [2019-11-23 22:28:44,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:28:44,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:44,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:28:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:44,039 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2019-11-23 22:28:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:44,127 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-23 22:28:44,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:28:44,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-23 22:28:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:44,128 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:28:44,129 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:28:44,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:28:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:28:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 22:28:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:28:44,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-11-23 22:28:44,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2019-11-23 22:28:44,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:44,143 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-11-23 22:28:44,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:28:44,143 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-11-23 22:28:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:28:44,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:44,147 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:44,148 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash -181903488, now seen corresponding path program 1 times [2019-11-23 22:28:44,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:44,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191373541] [2019-11-23 22:28:44,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:28:44,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191373541] [2019-11-23 22:28:44,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:44,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:28:44,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493312496] [2019-11-23 22:28:44,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:28:44,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:44,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:28:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:28:44,292 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2019-11-23 22:28:44,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:44,368 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-23 22:28:44,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:28:44,369 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-23 22:28:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:44,370 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:28:44,370 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:28:44,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:28:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:28:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 22:28:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:28:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-23 22:28:44,377 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2019-11-23 22:28:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:44,377 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-23 22:28:44,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:28:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-23 22:28:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:28:44,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:44,378 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:44,379 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:44,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1690360128, now seen corresponding path program 1 times [2019-11-23 22:28:44,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:44,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404342149] [2019-11-23 22:28:44,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:28:44,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404342149] [2019-11-23 22:28:44,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:28:44,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:28:44,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398759013] [2019-11-23 22:28:44,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:28:44,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:44,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:28:44,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:28:44,470 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-11-23 22:28:44,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:44,516 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2019-11-23 22:28:44,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:28:44,517 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-23 22:28:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:44,518 INFO L225 Difference]: With dead ends: 35 [2019-11-23 22:28:44,518 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 22:28:44,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:28:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 22:28:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-23 22:28:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:28:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-23 22:28:44,524 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2019-11-23 22:28:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:44,525 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-23 22:28:44,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:28:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-23 22:28:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:28:44,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:44,526 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:44,526 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash 806044638, now seen corresponding path program 1 times [2019-11-23 22:28:44,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:44,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035753480] [2019-11-23 22:28:44,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:28:44,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035753480] [2019-11-23 22:28:44,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472005110] [2019-11-23 22:28:44,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:44,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:44,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 22:28:44,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:44,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 22:28:44,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233586121] [2019-11-23 22:28:44,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:28:44,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:28:44,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:44,756 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-11-23 22:28:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:44,824 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-23 22:28:44,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:28:44,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-23 22:28:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:44,825 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:28:44,825 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 22:28:44,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:28:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 22:28:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-23 22:28:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:28:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-23 22:28:44,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2019-11-23 22:28:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:44,832 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-23 22:28:44,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:28:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-23 22:28:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:28:44,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:44,833 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:45,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:45,034 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:45,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1257196540, now seen corresponding path program 2 times [2019-11-23 22:28:45,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:45,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068458178] [2019-11-23 22:28:45,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:28:45,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068458178] [2019-11-23 22:28:45,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489634268] [2019-11-23 22:28:45,153 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:45,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:28:45,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:28:45,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:28:45,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:28:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 22:28:45,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:28:45,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 22:28:45,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617564771] [2019-11-23 22:28:45,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:28:45,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:28:45,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:28:45,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:28:45,262 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2019-11-23 22:28:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:28:45,348 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-11-23 22:28:45,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:28:45,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-23 22:28:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:28:45,349 INFO L225 Difference]: With dead ends: 48 [2019-11-23 22:28:45,349 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:28:45,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:28:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:28:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-11-23 22:28:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:28:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-23 22:28:45,355 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2019-11-23 22:28:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:28:45,355 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-23 22:28:45,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:28:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-23 22:28:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:28:45,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:28:45,357 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:28:45,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:28:45,558 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:28:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:28:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1118069564, now seen corresponding path program 3 times [2019-11-23 22:28:45,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:28:45,558 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368943738] [2019-11-23 22:28:45,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:28:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:28:47,103 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2019-11-23 22:28:57,370 WARN L192 SmtUtils]: Spent 9.79 s on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2019-11-23 22:29:22,918 WARN L192 SmtUtils]: Spent 25.28 s on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2019-11-23 22:29:30,723 WARN L192 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 116 DAG size of output: 68 [2019-11-23 22:29:48,550 WARN L192 SmtUtils]: Spent 17.76 s on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2019-11-23 22:29:48,882 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2019-11-23 22:29:53,102 WARN L192 SmtUtils]: Spent 2.62 s on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2019-11-23 22:29:57,023 WARN L192 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 100 DAG size of output: 70 [2019-11-23 22:29:59,074 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (= |c_ULTIMATE.start_main_~#x~0.offset| 0))) (and (= c_ULTIMATE.start_main_~i~1 0) (let ((.cse5 (* 4 c_ULTIMATE.start_main_~i~1))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~#x~0.offset| .cse5)) (.cse0 (<= 1 |c_ULTIMATE.start_main_~#x~0.offset|)) (.cse1 (<= (+ |c_ULTIMATE.start_main_~#x~0.offset| 1) 0))) (or (let ((.cse4 (* 4 c_~N~0))) (let ((.cse2 (= (+ .cse5 8) .cse4))) (and (or .cse0 .cse1 (not .cse2) (and (= 0 .cse3) (not (= .cse4 (+ .cse5 4))) .cse6 (= 0 .cse5) (let ((.cse9 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0.base|) (+ |c_ULTIMATE.start_main_~#x~0.offset| (* c_~N~0 4) (- 4)) c_ULTIMATE.start_main_~temp~0) (+ |c_ULTIMATE.start_main_~#x~0.offset| (* c_ULTIMATE.start_main_~i~1 4))))) (let ((.cse7 (<= c_ULTIMATE.start_main_~ret~1 c_ULTIMATE.start_main_~ret2~0)) (.cse8 (+ .cse9 c_ULTIMATE.start_main_~temp~0)) (.cse11 (<= c_ULTIMATE.start_main_~ret2~0 c_ULTIMATE.start_main_~ret~1)) (.cse12 (< c_ULTIMATE.start_main_~ret2~0 (+ c_ULTIMATE.start_main_~ret~1 1))) (.cse13 (< c_ULTIMATE.start_main_~ret2~0 c_ULTIMATE.start_main_~ret~1))) (or (and .cse7 (or (let ((.cse10 (* c_ULTIMATE.start_main_~ret~1 (- 1)))) (and (<= .cse8 (+ (* 4294967296 (div (+ .cse9 .cse10 c_ULTIMATE.start_main_~temp~0 (- 4294967296)) 4294967296)) 4294967295)) (or .cse11 .cse12) (<= (* 4294967296 (div (+ .cse9 .cse10 c_ULTIMATE.start_main_~temp~0 (- 1)) 4294967296)) .cse8))) .cse13) (<= .cse8 (+ (* 4294967296 (div (+ .cse9 c_ULTIMATE.start_main_~temp~0 (- 2147483648)) 4294967296)) 4294967295))) (let ((.cse15 (+ .cse9 c_ULTIMATE.start_main_~ret~1 c_ULTIMATE.start_main_~temp~0)) (.cse14 (* c_ULTIMATE.start_main_~ret2~0 (- 1)))) (and .cse7 (<= (* 4294967296 (div (+ .cse9 c_ULTIMATE.start_main_~temp~0 2147483648) 4294967296)) .cse8) (<= (+ (* 4294967296 (div (+ .cse9 .cse14 c_ULTIMATE.start_main_~temp~0 4294967295) 4294967296)) c_ULTIMATE.start_main_~ret2~0) .cse15) (<= .cse15 (+ c_ULTIMATE.start_main_~ret2~0 (* 4294967296 (div (+ .cse9 .cse14 c_ULTIMATE.start_main_~temp~0) 4294967296)) 2147483647)) (or .cse11 .cse12 .cse13)))))))) (or .cse2 (let ((.cse16 (+ c_ULTIMATE.start_main_~i~1 2))) (and (<= c_~N~0 2) (< .cse16 c_~N~0) (not (= .cse16 c_~N~0)))))))) (<= 1 .cse3) (<= (+ |c_ULTIMATE.start_main_~#x~0.offset| .cse5 1) 0) .cse0 .cse1))) .cse6)) is different from false [2019-11-23 22:30:25,131 WARN L192 SmtUtils]: Spent 20.10 s on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2019-11-23 22:30:27,459 WARN L192 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60