/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-examples/standard_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:21:01,769 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:21:01,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:21:01,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:21:01,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:21:01,852 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 01:21:01,866 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:21:01,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:21:01,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:21:01,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:21:01,868 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:21:01,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:21:01,868 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:21:01,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:21:01,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:21:01,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:21:01,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:21:01,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:21:01,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:21:01,870 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:21:01,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:21:01,870 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:21:01,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:21:01,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:21:01,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:21:01,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:21:01,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:21:01,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:21:01,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:21:01,872 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:21:01,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:21:01,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:21:01,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:21:01,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:21:01,873 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 01:21:02,182 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:21:02,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:21:02,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:21:02,204 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:21:02,205 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:21:02,205 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-11-07 01:21:02,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef99b1608/f8c6bb6642c346a38e815db24e0fc93c/FLAG2b926bc31 [2019-11-07 01:21:02,726 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:21:02,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-11-07 01:21:02,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef99b1608/f8c6bb6642c346a38e815db24e0fc93c/FLAG2b926bc31 [2019-11-07 01:21:03,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef99b1608/f8c6bb6642c346a38e815db24e0fc93c [2019-11-07 01:21:03,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:21:03,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:21:03,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:03,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:21:03,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:21:03,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b061174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03, skipping insertion in model container [2019-11-07 01:21:03,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,163 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:21:03,185 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:21:03,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:03,438 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:21:03,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:03,476 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:21:03,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03 WrapperNode [2019-11-07 01:21:03,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:03,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:21:03,477 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:21:03,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:21:03,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:21:03,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:21:03,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:21:03,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:21:03,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (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 01:21:03,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:21:03,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:21:03,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:21:03,683 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:21:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:21:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:21:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:21:03,683 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:21:03,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:21:03,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:21:03,684 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:21:03,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:21:03,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:21:03,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:21:04,057 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:21:04,058 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:21:04,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:04 BoogieIcfgContainer [2019-11-07 01:21:04,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:21:04,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:21:04,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:21:04,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:21:04,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:21:03" (1/3) ... [2019-11-07 01:21:04,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54441198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:04, skipping insertion in model container [2019-11-07 01:21:04,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (2/3) ... [2019-11-07 01:21:04,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54441198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:04, skipping insertion in model container [2019-11-07 01:21:04,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:04" (3/3) ... [2019-11-07 01:21:04,067 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2019-11-07 01:21:04,076 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:21:04,083 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:21:04,094 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:21:04,118 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:21:04,119 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:21:04,119 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:21:04,119 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:21:04,119 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:21:04,120 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:21:04,120 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:21:04,120 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:21:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-07 01:21:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:21:04,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:04,142 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:04,144 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:04,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:04,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1664756858, now seen corresponding path program 1 times [2019-11-07 01:21:04,156 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:04,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100713221] [2019-11-07 01:21:04,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:21:04,310 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100713221] [2019-11-07 01:21:04,311 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:04,311 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:04,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573931096] [2019-11-07 01:21:04,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:04,321 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:04,340 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-07 01:21:04,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:04,383 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2019-11-07 01:21:04,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:04,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:21:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:04,394 INFO L225 Difference]: With dead ends: 37 [2019-11-07 01:21:04,394 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:21:04,398 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 01:21:04,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:21:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:21:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:21:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:21:04,435 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-07 01:21:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:04,436 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:21:04,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:21:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:21:04,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:04,437 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:04,438 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1165016204, now seen corresponding path program 1 times [2019-11-07 01:21:04,439 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:04,439 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624619783] [2019-11-07 01:21:04,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624619783] [2019-11-07 01:21:04,517 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:04,517 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:04,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248019943] [2019-11-07 01:21:04,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:04,519 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:04,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:04,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:04,520 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2019-11-07 01:21:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:04,531 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-07 01:21:04,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:04,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-07 01:21:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:04,532 INFO L225 Difference]: With dead ends: 29 [2019-11-07 01:21:04,533 INFO L226 Difference]: Without dead ends: 19 [2019-11-07 01:21:04,534 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 01:21:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-07 01:21:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-07 01:21:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-07 01:21:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-07 01:21:04,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-11-07 01:21:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:04,541 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-07 01:21:04,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-07 01:21:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 01:21:04,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:04,543 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:04,543 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:04,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:04,544 INFO L82 PathProgramCache]: Analyzing trace with hash -695054757, now seen corresponding path program 1 times [2019-11-07 01:21:04,544 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:04,544 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617265052] [2019-11-07 01:21:04,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,645 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617265052] [2019-11-07 01:21:04,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134827901] [2019-11-07 01:21:04,646 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 01:21:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:21:04,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,740 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98361065] [2019-11-07 01:21:04,859 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:04,859 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:04,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:04,881 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:04,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:05,033 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:05,294 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:05,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:05,306 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:05,710 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:05,711 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-11-07 01:21:05,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022217741] [2019-11-07 01:21:05,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:21:05,714 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:05,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:21:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:21:05,717 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 18 states. [2019-11-07 01:21:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:06,349 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2019-11-07 01:21:06,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-07 01:21:06,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-11-07 01:21:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:06,350 INFO L225 Difference]: With dead ends: 43 [2019-11-07 01:21:06,351 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:21:06,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2019-11-07 01:21:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:21:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2019-11-07 01:21:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:21:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-07 01:21:06,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-11-07 01:21:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:06,371 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-07 01:21:06,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:21:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-07 01:21:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:21:06,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:06,373 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:06,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:06,579 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:06,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1936234603, now seen corresponding path program 2 times [2019-11-07 01:21:06,581 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:06,581 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442603391] [2019-11-07 01:21:06,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:06,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442603391] [2019-11-07 01:21:06,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294975155] [2019-11-07 01:21:06,683 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 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 01:21:06,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:21:06,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:06,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:21:06,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:06,755 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:06,773 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540369479] [2019-11-07 01:21:06,774 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:06,774 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:06,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:06,775 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:06,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:06,806 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:06,962 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:06,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:06,976 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:07,273 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:07,273 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-11-07 01:21:07,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097204251] [2019-11-07 01:21:07,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:21:07,275 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:07,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:21:07,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:21:07,276 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 18 states. [2019-11-07 01:21:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:07,933 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2019-11-07 01:21:07,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-07 01:21:07,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2019-11-07 01:21:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:07,936 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:21:07,936 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:21:07,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2019-11-07 01:21:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:21:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-11-07 01:21:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:21:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-07 01:21:07,944 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2019-11-07 01:21:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:07,945 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-07 01:21:07,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:21:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-07 01:21:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:21:07,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:07,946 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:08,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:08,149 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash 62974394, now seen corresponding path program 3 times [2019-11-07 01:21:08,151 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:08,151 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963928217] [2019-11-07 01:21:08,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:08,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963928217] [2019-11-07 01:21:08,259 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142829026] [2019-11-07 01:21:08,259 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 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 01:21:08,313 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:08,313 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:08,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:21:08,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:08,388 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:08,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287339147] [2019-11-07 01:21:08,467 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:08,468 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:08,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:08,470 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:08,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:08,517 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:08,632 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:08,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:08,640 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:08,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:08,993 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 12] total 28 [2019-11-07 01:21:08,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265716921] [2019-11-07 01:21:08,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-07 01:21:08,995 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:08,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-07 01:21:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:21:08,996 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 28 states. [2019-11-07 01:21:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:10,051 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-07 01:21:10,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-07 01:21:10,052 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 21 [2019-11-07 01:21:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:10,053 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:21:10,053 INFO L226 Difference]: Without dead ends: 41 [2019-11-07 01:21:10,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=364, Invalid=2186, Unknown=0, NotChecked=0, Total=2550 [2019-11-07 01:21:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-07 01:21:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-11-07 01:21:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:21:10,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-07 01:21:10,063 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2019-11-07 01:21:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:10,063 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-07 01:21:10,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-07 01:21:10,063 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-07 01:21:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:21:10,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:10,064 INFO L410 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:10,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:10,270 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:10,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:10,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1767947029, now seen corresponding path program 4 times [2019-11-07 01:21:10,272 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:10,272 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126638163] [2019-11-07 01:21:10,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:21:10,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126638163] [2019-11-07 01:21:10,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858459942] [2019-11-07 01:21:10,403 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 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 01:21:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:10,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:21:10,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:21:10,474 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:21:10,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339182718] [2019-11-07 01:21:10,660 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:10,660 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:10,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:10,661 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:10,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:10,683 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:10,778 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:10,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:10,787 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:11,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:11,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 12] total 36 [2019-11-07 01:21:11,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906323183] [2019-11-07 01:21:11,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-07 01:21:11,198 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-07 01:21:11,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2019-11-07 01:21:11,199 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 36 states. [2019-11-07 01:21:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:12,397 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2019-11-07 01:21:12,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-07 01:21:12,397 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 28 [2019-11-07 01:21:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:12,398 INFO L225 Difference]: With dead ends: 69 [2019-11-07 01:21:12,398 INFO L226 Difference]: Without dead ends: 53 [2019-11-07 01:21:12,400 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=949, Invalid=3341, Unknown=0, NotChecked=0, Total=4290 [2019-11-07 01:21:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-07 01:21:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-11-07 01:21:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-07 01:21:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-07 01:21:12,409 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 28 [2019-11-07 01:21:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:12,409 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-07 01:21:12,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-07 01:21:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-07 01:21:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-07 01:21:12,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:12,411 INFO L410 BasicCegarLoop]: trace histogram [22, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:12,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:12,620 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:12,621 INFO L82 PathProgramCache]: Analyzing trace with hash -7782507, now seen corresponding path program 5 times [2019-11-07 01:21:12,621 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:12,622 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003755206] [2019-11-07 01:21:12,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:21:12,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003755206] [2019-11-07 01:21:12,944 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106842659] [2019-11-07 01:21:12,944 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 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 01:21:13,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-07 01:21:13,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:13,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:21:13,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:21:13,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:21:13,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107350497] [2019-11-07 01:21:13,277 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:13,277 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:13,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:13,278 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:13,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:13,302 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:13,393 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:13,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:13,400 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:13,859 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:13,859 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8, 8, 12] total 48 [2019-11-07 01:21:13,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454546525] [2019-11-07 01:21:13,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-07 01:21:13,861 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:13,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-07 01:21:13,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1832, Unknown=0, NotChecked=0, Total=2256 [2019-11-07 01:21:13,864 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 48 states. [2019-11-07 01:21:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:16,096 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-11-07 01:21:16,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-07 01:21:16,096 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 40 [2019-11-07 01:21:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:16,097 INFO L225 Difference]: With dead ends: 77 [2019-11-07 01:21:16,098 INFO L226 Difference]: Without dead ends: 61 [2019-11-07 01:21:16,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1290, Invalid=6900, Unknown=0, NotChecked=0, Total=8190 [2019-11-07 01:21:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-07 01:21:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2019-11-07 01:21:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-07 01:21:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-07 01:21:16,115 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 40 [2019-11-07 01:21:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:16,116 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-07 01:21:16,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-07 01:21:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-07 01:21:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-07 01:21:16,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:16,117 INFO L410 BasicCegarLoop]: trace histogram [23, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:16,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:16,325 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1950177524, now seen corresponding path program 6 times [2019-11-07 01:21:16,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:16,326 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705943644] [2019-11-07 01:21:16,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:16,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705943644] [2019-11-07 01:21:16,709 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713675705] [2019-11-07 01:21:16,709 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 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 01:21:16,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:16,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:16,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-07 01:21:16,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:16,825 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:17,562 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101750433] [2019-11-07 01:21:17,564 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:17,564 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:17,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:17,564 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:17,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:17,590 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:17,673 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:17,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:17,680 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:18,258 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:18,259 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 12] total 62 [2019-11-07 01:21:18,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114176823] [2019-11-07 01:21:18,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-11-07 01:21:18,260 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:18,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-11-07 01:21:18,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1309, Invalid=2473, Unknown=0, NotChecked=0, Total=3782 [2019-11-07 01:21:18,263 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 62 states. [2019-11-07 01:21:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:21,077 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2019-11-07 01:21:21,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-07 01:21:21,078 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 48 [2019-11-07 01:21:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:21,080 INFO L225 Difference]: With dead ends: 109 [2019-11-07 01:21:21,080 INFO L226 Difference]: Without dead ends: 86 [2019-11-07 01:21:21,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3822, Invalid=9984, Unknown=0, NotChecked=0, Total=13806 [2019-11-07 01:21:21,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-07 01:21:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2019-11-07 01:21:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-07 01:21:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-11-07 01:21:21,095 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 48 [2019-11-07 01:21:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:21,096 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-11-07 01:21:21,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-11-07 01:21:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-11-07 01:21:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-07 01:21:21,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:21,099 INFO L410 BasicCegarLoop]: trace histogram [48, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:21,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:21,303 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1289296198, now seen corresponding path program 7 times [2019-11-07 01:21:21,304 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:21,304 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27641598] [2019-11-07 01:21:21,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:22,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27641598] [2019-11-07 01:21:22,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581043833] [2019-11-07 01:21:22,477 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 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 01:21:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:22,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-07 01:21:22,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:22,633 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1254 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:26,079 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942122028] [2019-11-07 01:21:26,080 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:26,080 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:26,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:26,081 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:26,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:26,102 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:26,309 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:26,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:26,314 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:26,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:26,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 12] total 112 [2019-11-07 01:21:26,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770371870] [2019-11-07 01:21:26,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 112 states [2019-11-07 01:21:26,911 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2019-11-07 01:21:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5084, Invalid=7348, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:21:26,916 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 112 states. [2019-11-07 01:21:34,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:34,726 INFO L93 Difference]: Finished difference Result 159 states and 212 transitions. [2019-11-07 01:21:34,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-11-07 01:21:34,727 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 73 [2019-11-07 01:21:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:34,728 INFO L225 Difference]: With dead ends: 159 [2019-11-07 01:21:34,729 INFO L226 Difference]: Without dead ends: 136 [2019-11-07 01:21:34,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9512 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=15047, Invalid=32259, Unknown=0, NotChecked=0, Total=47306 [2019-11-07 01:21:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-07 01:21:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 127. [2019-11-07 01:21:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-07 01:21:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2019-11-07 01:21:34,782 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 73 [2019-11-07 01:21:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:34,784 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2019-11-07 01:21:34,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 112 states. [2019-11-07 01:21:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2019-11-07 01:21:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-07 01:21:34,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:34,789 INFO L410 BasicCegarLoop]: trace histogram [98, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:34,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:34,992 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:34,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1394502662, now seen corresponding path program 8 times [2019-11-07 01:21:34,993 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:34,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580863123] [2019-11-07 01:21:34,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4929 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:39,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580863123] [2019-11-07 01:21:39,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269269641] [2019-11-07 01:21:39,477 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 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 01:21:39,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-07 01:21:39,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:39,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:21:39,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4929 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2019-11-07 01:21:40,324 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4929 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2019-11-07 01:21:41,038 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811164014] [2019-11-07 01:21:41,039 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:41,039 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:41,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:41,040 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:41,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:41,059 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:41,143 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:41,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:41,149 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:42,053 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:42,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 15, 15, 12] total 138 [2019-11-07 01:21:42,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563843373] [2019-11-07 01:21:42,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 138 states [2019-11-07 01:21:42,056 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:42,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2019-11-07 01:21:42,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5461, Invalid=13445, Unknown=0, NotChecked=0, Total=18906 [2019-11-07 01:21:42,059 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 138 states.