/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-crafted/bor3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:16:07,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:16:07,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:16:07,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:16:07,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:16:07,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:16:07,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:16:07,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:16:07,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:16:07,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:16:07,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:16:07,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:16:07,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:16:07,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:16:07,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:16:07,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:16:07,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:16:07,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:16:07,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:16:07,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:16:07,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:16:07,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:16:07,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:16:07,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:16:07,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:16:07,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:16:07,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:16:07,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:16:07,395 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 [2019-11-07 01:16:07,409 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:16:07,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:16:07,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:16:07,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:16:07,411 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:16:07,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:16:07,412 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:16:07,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:16:07,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:16:07,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:16:07,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:16:07,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:16:07,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:16:07,413 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:16:07,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:16:07,413 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:16:07,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:16:07,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:16:07,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:16:07,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:16:07,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:16:07,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:16:07,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:16:07,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:16:07,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:16:07,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:16:07,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:16:07,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:16:07,416 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:16:07,722 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:16:07,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:16:07,744 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:16:07,746 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:16:07,747 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:16:07,748 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor3.i [2019-11-07 01:16:07,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea75c87b6/953976a6032146849a0fe82b9a095eeb/FLAG2e33310c4 [2019-11-07 01:16:08,292 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:16:08,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor3.i [2019-11-07 01:16:08,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea75c87b6/953976a6032146849a0fe82b9a095eeb/FLAG2e33310c4 [2019-11-07 01:16:08,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea75c87b6/953976a6032146849a0fe82b9a095eeb [2019-11-07 01:16:08,656 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:16:08,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:16:08,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:16:08,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:16:08,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:16:08,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:08" (1/1) ... [2019-11-07 01:16:08,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d34e1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:08, skipping insertion in model container [2019-11-07 01:16:08,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:16:08" (1/1) ... [2019-11-07 01:16:08,674 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:16:08,691 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:16:08,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:16:08,903 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:16:08,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:16:09,013 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:16:09,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09 WrapperNode [2019-11-07 01:16:09,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:16:09,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:16:09,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:16:09,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:16:09,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (1/1) ... [2019-11-07 01:16:09,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (1/1) ... [2019-11-07 01:16:09,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (1/1) ... [2019-11-07 01:16:09,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (1/1) ... [2019-11-07 01:16:09,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (1/1) ... [2019-11-07 01:16:09,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (1/1) ... [2019-11-07 01:16:09,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (1/1) ... [2019-11-07 01:16:09,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:16:09,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:16:09,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:16:09,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:16:09,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (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 [2019-11-07 01:16:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:16:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:16:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2019-11-07 01:16:09,119 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:16:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:16:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:16:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2019-11-07 01:16:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:16:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:16:09,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:16:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:16:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:16:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:16:09,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:16:09,510 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:16:09,510 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:16:09,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:09 BoogieIcfgContainer [2019-11-07 01:16:09,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:16:09,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:16:09,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:16:09,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:16:09,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:16:08" (1/3) ... [2019-11-07 01:16:09,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe019a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:09, skipping insertion in model container [2019-11-07 01:16:09,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:16:09" (2/3) ... [2019-11-07 01:16:09,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe019a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:16:09, skipping insertion in model container [2019-11-07 01:16:09,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:16:09" (3/3) ... [2019-11-07 01:16:09,521 INFO L109 eAbstractionObserver]: Analyzing ICFG bor3.i [2019-11-07 01:16:09,540 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:16:09,557 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:16:09,569 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:16:09,598 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:16:09,599 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:16:09,599 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:16:09,599 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:16:09,600 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:16:09,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:16:09,600 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:16:09,600 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:16:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 01:16:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 01:16:09,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:09,623 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:09,624 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:09,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2002379581, now seen corresponding path program 1 times [2019-11-07 01:16:09,637 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:09,638 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617332499] [2019-11-07 01:16:09,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-07 01:16:09,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617332499] [2019-11-07 01:16:09,851 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:16:09,851 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:16:09,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727027118] [2019-11-07 01:16:09,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:16:09,861 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:09,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:16:09,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:16:09,883 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 01:16:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:09,938 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-11-07 01:16:09,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:16:09,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-07 01:16:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:09,953 INFO L225 Difference]: With dead ends: 41 [2019-11-07 01:16:09,953 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:16:09,960 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 [2019-11-07 01:16:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:16:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:16:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:16:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 01:16:10,017 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-11-07 01:16:10,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:10,019 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 01:16:10,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:16:10,020 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 01:16:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-07 01:16:10,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:10,024 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:10,024 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1232729663, now seen corresponding path program 1 times [2019-11-07 01:16:10,026 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:10,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301159375] [2019-11-07 01:16:10,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:16:10,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301159375] [2019-11-07 01:16:10,173 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550532017] [2019-11-07 01:16:10,173 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 [2019-11-07 01:16:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:10,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:16:10,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:16:10,298 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:16:10,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:16:10,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:16:10,371 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:16:10,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604817839] [2019-11-07 01:16:10,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:16:10,374 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:16:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:16:10,375 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-11-07 01:16:10,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:10,388 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-07 01:16:10,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:16:10,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-07 01:16:10,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:10,390 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:16:10,390 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:16:10,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:16:10,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:16:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 01:16:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 01:16:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 01:16:10,398 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-11-07 01:16:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:10,399 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 01:16:10,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:16:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 01:16:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:16:10,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:10,400 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:10,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:10,606 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash 638962104, now seen corresponding path program 1 times [2019-11-07 01:16:10,608 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:10,608 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985512855] [2019-11-07 01:16:10,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:16:10,693 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985512855] [2019-11-07 01:16:10,694 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:16:10,694 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:16:10,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684470723] [2019-11-07 01:16:10,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:16:10,695 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:10,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:16:10,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:16:10,696 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 01:16:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:10,706 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-07 01:16:10,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:16:10,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-11-07 01:16:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:10,708 INFO L225 Difference]: With dead ends: 31 [2019-11-07 01:16:10,708 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:16:10,709 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 [2019-11-07 01:16:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:16:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:16:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:16:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 01:16:10,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-11-07 01:16:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:10,717 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 01:16:10,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:16:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 01:16:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 01:16:10,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:10,718 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:10,719 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -454929733, now seen corresponding path program 1 times [2019-11-07 01:16:10,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:10,720 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125271093] [2019-11-07 01:16:10,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:16:10,840 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125271093] [2019-11-07 01:16:10,840 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691172680] [2019-11-07 01:16:10,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-07 01:16:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:10,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:16:10,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:16:10,955 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:16:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:16:10,991 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414461785] [2019-11-07 01:16:11,018 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:16:11,019 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:16:11,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:16:11,032 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:16:11,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:16:11,155 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:16:11,733 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-11-07 01:16:11,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:16:11,770 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:16:12,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:16:12,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 15] total 21 [2019-11-07 01:16:12,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661933967] [2019-11-07 01:16:12,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-07 01:16:12,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-07 01:16:12,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-07 01:16:12,434 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 21 states. [2019-11-07 01:16:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:19,439 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 01:16:19,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-07 01:16:19,440 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-07 01:16:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:19,442 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:16:19,442 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 01:16:19,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=170, Invalid=1087, Unknown=3, NotChecked=0, Total=1260 [2019-11-07 01:16:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 01:16:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-07 01:16:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:16:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 01:16:19,450 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-11-07 01:16:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:19,451 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 01:16:19,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-07 01:16:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 01:16:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:16:19,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:19,453 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:19,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:19,665 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash 545849657, now seen corresponding path program 2 times [2019-11-07 01:16:19,666 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:19,666 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160456185] [2019-11-07 01:16:19,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-07 01:16:19,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160456185] [2019-11-07 01:16:19,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39743395] [2019-11-07 01:16:19,792 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:19,856 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:16:19,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:16:19,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:16:19,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:16:19,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:16:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:16:19,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1811312025] [2019-11-07 01:16:19,923 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:16:19,925 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:16:19,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:16:19,926 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:16:19,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:16:19,971 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:16:20,271 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-11-07 01:16:20,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:16:20,292 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:16:20,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:16:20,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 15] total 25 [2019-11-07 01:16:20,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964045961] [2019-11-07 01:16:20,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-07 01:16:20,922 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-07 01:16:20,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2019-11-07 01:16:20,924 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 25 states. [2019-11-07 01:16:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:24,118 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-07 01:16:24,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-07 01:16:24,118 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-07 01:16:24,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:24,119 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:16:24,120 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:16:24,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=247, Invalid=1733, Unknown=0, NotChecked=0, Total=1980 [2019-11-07 01:16:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:16:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-07 01:16:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:16:24,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-07 01:16:24,130 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-11-07 01:16:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:24,130 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-07 01:16:24,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-07 01:16:24,131 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-07 01:16:24,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-07 01:16:24,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:24,132 INFO L410 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:24,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:24,336 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:24,337 INFO L82 PathProgramCache]: Analyzing trace with hash -633329328, now seen corresponding path program 3 times [2019-11-07 01:16:24,338 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:24,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489532061] [2019-11-07 01:16:24,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:16:24,461 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489532061] [2019-11-07 01:16:24,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172994481] [2019-11-07 01:16:24,462 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:24,525 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:16:24,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:16:24,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:16:24,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:16:24,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:16:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:16:24,623 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [119013541] [2019-11-07 01:16:24,624 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:16:24,627 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:16:24,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:16:24,628 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:16:24,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:16:24,659 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:16:25,007 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-11-07 01:16:25,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:16:25,043 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:16:25,802 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:16:25,803 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 15] total 29 [2019-11-07 01:16:25,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743391990] [2019-11-07 01:16:25,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 01:16:25,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 01:16:25,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:16:25,805 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2019-11-07 01:16:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:29,235 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-11-07 01:16:29,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:16:29,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 42 [2019-11-07 01:16:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:29,237 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:16:29,237 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 01:16:29,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2019-11-07 01:16:29,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 01:16:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-07 01:16:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 01:16:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-07 01:16:29,249 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-11-07 01:16:29,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:29,250 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-07 01:16:29,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 01:16:29,250 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-07 01:16:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-07 01:16:29,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:29,252 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:29,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:29,455 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:29,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1897195758, now seen corresponding path program 4 times [2019-11-07 01:16:29,456 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:29,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086769801] [2019-11-07 01:16:29,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:16:29,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086769801] [2019-11-07 01:16:29,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621372005] [2019-11-07 01:16:29,698 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:29,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:16:29,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:16:29,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:16:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:16:30,049 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66525724] [2019-11-07 01:16:30,051 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:16:30,051 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:16:30,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:16:30,052 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:16:30,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:16:30,072 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:16:30,330 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-11-07 01:16:30,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:16:30,351 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:16:31,021 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:16:31,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15] total 43 [2019-11-07 01:16:31,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238685304] [2019-11-07 01:16:31,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-07 01:16:31,023 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-07 01:16:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2019-11-07 01:16:31,025 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 43 states. [2019-11-07 01:16:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:33,478 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-11-07 01:16:33,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-07 01:16:33,478 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 49 [2019-11-07 01:16:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:33,479 INFO L225 Difference]: With dead ends: 68 [2019-11-07 01:16:33,480 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 01:16:33,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1281, Invalid=5039, Unknown=0, NotChecked=0, Total=6320 [2019-11-07 01:16:33,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 01:16:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-07 01:16:33,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 01:16:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-07 01:16:33,492 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-11-07 01:16:33,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:33,493 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-07 01:16:33,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-07 01:16:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-07 01:16:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-07 01:16:33,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:33,495 INFO L410 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:33,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:33,699 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash -755090094, now seen corresponding path program 5 times [2019-11-07 01:16:33,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:33,700 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762053857] [2019-11-07 01:16:33,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-07 01:16:34,185 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762053857] [2019-11-07 01:16:34,186 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239379959] [2019-11-07 01:16:34,186 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:34,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:16:34,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:16:34,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:16:34,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-11-07 01:16:34,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:16:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-11-07 01:16:34,351 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2134546814] [2019-11-07 01:16:34,353 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:16:34,354 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:16:34,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:16:34,355 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:16:34,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:16:34,370 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:16:34,592 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-11-07 01:16:34,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:16:34,611 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:16:37,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:16:37,792 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 15] total 47 [2019-11-07 01:16:37,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407657854] [2019-11-07 01:16:37,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-07 01:16:37,793 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:37,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-07 01:16:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=1701, Unknown=1, NotChecked=0, Total=2162 [2019-11-07 01:16:37,794 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 47 states. [2019-11-07 01:16:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:42,249 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-11-07 01:16:42,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-07 01:16:42,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 63 [2019-11-07 01:16:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:42,251 INFO L225 Difference]: With dead ends: 72 [2019-11-07 01:16:42,252 INFO L226 Difference]: Without dead ends: 54 [2019-11-07 01:16:42,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1386, Invalid=6445, Unknown=1, NotChecked=0, Total=7832 [2019-11-07 01:16:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-07 01:16:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-07 01:16:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-07 01:16:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-11-07 01:16:42,264 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-11-07 01:16:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:42,264 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-11-07 01:16:42,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-07 01:16:42,264 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-11-07 01:16:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-07 01:16:42,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:42,266 INFO L410 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:42,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:42,468 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:42,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1616126463, now seen corresponding path program 6 times [2019-11-07 01:16:42,469 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:42,469 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627230831] [2019-11-07 01:16:42,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:16:42,937 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627230831] [2019-11-07 01:16:42,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081216316] [2019-11-07 01:16:42,938 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:43,053 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:16:43,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:16:43,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 01:16:43,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:16:43,084 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:16:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:16:44,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593178622] [2019-11-07 01:16:44,069 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-07 01:16:44,069 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:16:44,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:16:44,070 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:16:44,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:16:44,104 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:16:44,317 INFO L197 IcfgInterpreter]: Interpreting procedure bor with input of size 1 for LOIs [2019-11-07 01:16:44,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:16:44,335 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:16:45,579 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:16:45,579 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 15] total 73 [2019-11-07 01:16:45,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550843104] [2019-11-07 01:16:45,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-07 01:16:45,586 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:16:45,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-07 01:16:45,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1751, Invalid=3505, Unknown=0, NotChecked=0, Total=5256 [2019-11-07 01:16:45,593 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 73 states. [2019-11-07 01:16:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:16:49,796 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-11-07 01:16:49,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-11-07 01:16:49,797 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 67 [2019-11-07 01:16:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:16:49,799 INFO L225 Difference]: With dead ends: 104 [2019-11-07 01:16:49,799 INFO L226 Difference]: Without dead ends: 83 [2019-11-07 01:16:49,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5136, Invalid=14324, Unknown=0, NotChecked=0, Total=19460 [2019-11-07 01:16:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-07 01:16:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-11-07 01:16:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-07 01:16:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-07 01:16:49,824 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-11-07 01:16:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:16:49,824 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-07 01:16:49,824 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-07 01:16:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-07 01:16:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-07 01:16:49,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:16:49,826 INFO L410 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:16:50,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:50,030 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:16:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:16:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1754158397, now seen corresponding path program 7 times [2019-11-07 01:16:50,030 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:16:50,030 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370186861] [2019-11-07 01:16:50,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:16:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:16:51,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370186861] [2019-11-07 01:16:51,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951928338] [2019-11-07 01:16:51,635 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:16:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:16:51,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-07 01:16:51,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:16:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-07 01:16:51,820 INFO L321 TraceCheckSpWp]: Computing backward predicates...