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 -i ../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:03,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:03,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:03,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:03,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:03,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:03,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:03,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:03,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:03,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:03,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:03,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:03,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:03,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:03,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:03,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:03,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:03,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:03,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:03,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:03,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:03,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:03,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:03,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:03,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:03,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:03,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:03,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:03,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:03,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:03,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:03,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:03,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:03,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:03,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:03,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:03,188 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 [2019-10-14 21:45:03,222 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:03,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:03,227 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:03,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:03,228 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:03,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:03,228 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:03,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:03,228 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:03,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:03,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:03,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:03,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:03,230 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:03,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:03,230 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:03,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:03,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:03,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:03,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:03,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:03,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:03,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:03,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:03,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:03,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:03,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:03,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:03,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:03,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:03,563 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:03,567 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:03,568 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:03,569 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:03,570 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-10-14 21:45:03,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761e0df36/14071edf95494a8c96eeb86b0f6b2b80/FLAGdb55433a9 [2019-10-14 21:45:04,162 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:04,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-10-14 21:45:04,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761e0df36/14071edf95494a8c96eeb86b0f6b2b80/FLAGdb55433a9 [2019-10-14 21:45:04,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/761e0df36/14071edf95494a8c96eeb86b0f6b2b80 [2019-10-14 21:45:04,577 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:04,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:04,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:04,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:04,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:04,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b68018e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04, skipping insertion in model container [2019-10-14 21:45:04,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,595 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:04,612 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:04,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:04,811 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:04,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:04,852 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:04,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04 WrapperNode [2019-10-14 21:45:04,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:04,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:04,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:04,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:04,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (1/1) ... [2019-10-14 21:45:04,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:04,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:04,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:04,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:04,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (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 [2019-10-14 21:45:05,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:05,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:05,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:05,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:05,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:05,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:05,043 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:05,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:05,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:05,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:05,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:05,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:05,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:05,306 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:05,307 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 21:45:05,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:05 BoogieIcfgContainer [2019-10-14 21:45:05,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:05,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:05,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:05,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:05,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:04" (1/3) ... [2019-10-14 21:45:05,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f52939c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:05, skipping insertion in model container [2019-10-14 21:45:05,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:04" (2/3) ... [2019-10-14 21:45:05,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f52939c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:05, skipping insertion in model container [2019-10-14 21:45:05,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:05" (3/3) ... [2019-10-14 21:45:05,324 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2019-10-14 21:45:05,337 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:05,347 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:05,370 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:05,407 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:05,407 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:05,407 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:05,408 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:05,408 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:05,408 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:05,408 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:05,408 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-10-14 21:45:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:45:05,429 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:05,430 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:05,432 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1568614638, now seen corresponding path program 1 times [2019-10-14 21:45:05,444 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:05,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716697825] [2019-10-14 21:45:05,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:05,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:05,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:05,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716697825] [2019-10-14 21:45:05,614 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:05,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:05,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078316077] [2019-10-14 21:45:05,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:05,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:05,633 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-10-14 21:45:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:05,767 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2019-10-14 21:45:05,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:05,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-14 21:45:05,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:05,778 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:45:05,778 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:45:05,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:45:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 21:45:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:45:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-14 21:45:05,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2019-10-14 21:45:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:05,820 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-14 21:45:05,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-14 21:45:05,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:45:05,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:05,821 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:05,822 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:05,823 INFO L82 PathProgramCache]: Analyzing trace with hash -395002610, now seen corresponding path program 1 times [2019-10-14 21:45:05,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:05,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991271484] [2019-10-14 21:45:05,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:05,824 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:05,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:05,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991271484] [2019-10-14 21:45:05,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:05,914 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:05,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237197695] [2019-10-14 21:45:05,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:05,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:05,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:05,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:05,922 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2019-10-14 21:45:06,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:06,044 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2019-10-14 21:45:06,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:06,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:45:06,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:06,046 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:45:06,047 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:45:06,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:45:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:45:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:45:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:45:06,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2019-10-14 21:45:06,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:06,057 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:45:06,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:45:06,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:45:06,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:06,059 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:06,059 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:06,060 INFO L82 PathProgramCache]: Analyzing trace with hash 47445068, now seen corresponding path program 1 times [2019-10-14 21:45:06,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:06,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646844622] [2019-10-14 21:45:06,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:06,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:06,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:45:06,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646844622] [2019-10-14 21:45:06,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077855867] [2019-10-14 21:45:06,175 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 [2019-10-14 21:45:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:06,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:06,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:45:06,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:06,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:06,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923398590] [2019-10-14 21:45:06,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:06,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:06,325 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2019-10-14 21:45:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:06,446 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-10-14 21:45:06,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:06,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-14 21:45:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:06,448 INFO L225 Difference]: With dead ends: 52 [2019-10-14 21:45:06,448 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:45:06,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:45:06,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:45:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:45:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 21:45:06,459 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2019-10-14 21:45:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:06,459 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 21:45:06,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 21:45:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:45:06,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:06,461 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:06,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:06,665 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:06,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1810840398, now seen corresponding path program 2 times [2019-10-14 21:45:06,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:06,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367535518] [2019-10-14 21:45:06,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:06,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:06,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:45:06,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367535518] [2019-10-14 21:45:06,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211626325] [2019-10-14 21:45:06,816 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:06,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:06,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:06,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:06,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:45:06,878 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:06,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:06,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623271556] [2019-10-14 21:45:06,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:06,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:06,880 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2019-10-14 21:45:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:06,989 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-10-14 21:45:06,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:06,990 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-10-14 21:45:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:06,991 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:45:06,991 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:45:06,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:45:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 21:45:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:45:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-14 21:45:06,999 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2019-10-14 21:45:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:07,000 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-14 21:45:07,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-14 21:45:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:45:07,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,002 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:07,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:07,205 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1527698548, now seen corresponding path program 3 times [2019-10-14 21:45:07,207 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990335236] [2019-10-14 21:45:07,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:45:07,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990335236] [2019-10-14 21:45:07,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56138429] [2019-10-14 21:45:07,349 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 [2019-10-14 21:45:07,408 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:07,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:07,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:07,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 21:45:07,425 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:07,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:07,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476406452] [2019-10-14 21:45:07,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:07,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:07,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:07,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:07,428 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2019-10-14 21:45:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:07,563 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2019-10-14 21:45:07,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:07,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-10-14 21:45:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:07,565 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:45:07,565 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:45:07,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:45:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:45:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:45:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-14 21:45:07,574 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 31 [2019-10-14 21:45:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:07,574 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-14 21:45:07,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-14 21:45:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:45:07,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,576 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:07,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:07,788 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1451349618, now seen corresponding path program 4 times [2019-10-14 21:45:07,789 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901422889] [2019-10-14 21:45:07,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,790 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:45:07,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901422889] [2019-10-14 21:45:07,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487695462] [2019-10-14 21:45:07,900 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 [2019-10-14 21:45:07,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:07,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:07,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:07,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:45:07,987 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:07,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:07,988 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999088319] [2019-10-14 21:45:07,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:07,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:07,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:07,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:07,989 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 9 states. [2019-10-14 21:45:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:08,130 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2019-10-14 21:45:08,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:08,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-10-14 21:45:08,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:08,132 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:45:08,132 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 21:45:08,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 21:45:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 21:45:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:45:08,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-14 21:45:08,141 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2019-10-14 21:45:08,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:08,141 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-14 21:45:08,141 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:08,141 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-14 21:45:08,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:45:08,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:08,143 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:08,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:08,348 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2058629836, now seen corresponding path program 5 times [2019-10-14 21:45:08,349 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:08,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200297416] [2019-10-14 21:45:08,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 21:45:08,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200297416] [2019-10-14 21:45:08,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395836856] [2019-10-14 21:45:08,465 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 21:45:08,770 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:08,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:08,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:08,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-14 21:45:08,791 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:08,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:08,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86257399] [2019-10-14 21:45:08,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:08,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:08,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:08,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:08,793 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 10 states. [2019-10-14 21:45:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:08,920 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2019-10-14 21:45:08,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:08,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-10-14 21:45:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:08,922 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:45:08,922 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:45:08,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:45:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 21:45:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:45:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-10-14 21:45:08,929 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 39 [2019-10-14 21:45:08,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:08,930 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-10-14 21:45:08,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-10-14 21:45:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:45:08,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:08,931 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:09,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,139 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:09,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1129940942, now seen corresponding path program 6 times [2019-10-14 21:45:09,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:09,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934454279] [2019-10-14 21:45:09,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:45:09,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934454279] [2019-10-14 21:45:09,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110927247] [2019-10-14 21:45:09,258 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 21:45:09,629 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:09,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:09,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:09,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 21:45:09,660 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:09,661 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:09,661 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183591262] [2019-10-14 21:45:09,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:09,662 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:09,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:09,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:09,666 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2019-10-14 21:45:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:09,773 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2019-10-14 21:45:09,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:09,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2019-10-14 21:45:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:09,774 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:45:09,775 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:45:09,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:45:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:45:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:45:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-10-14 21:45:09,782 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2019-10-14 21:45:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:09,783 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-10-14 21:45:09,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-10-14 21:45:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:45:09,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:09,784 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:09,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,985 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:09,986 INFO L82 PathProgramCache]: Analyzing trace with hash -2092627444, now seen corresponding path program 7 times [2019-10-14 21:45:09,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:09,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5790194] [2019-10-14 21:45:09,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,986 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:45:10,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5790194] [2019-10-14 21:45:10,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518316341] [2019-10-14 21:45:10,125 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 [2019-10-14 21:45:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:10,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:45:10,238 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:10,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:10,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692085151] [2019-10-14 21:45:10,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:10,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:10,242 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 12 states. [2019-10-14 21:45:10,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:10,405 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-10-14 21:45:10,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:10,405 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-10-14 21:45:10,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:10,406 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:45:10,406 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:45:10,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:10,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:45:10,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 21:45:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:45:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-10-14 21:45:10,414 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2019-10-14 21:45:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:10,415 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-10-14 21:45:10,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-10-14 21:45:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:45:10,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:10,416 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:10,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:10,624 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2092520974, now seen corresponding path program 8 times [2019-10-14 21:45:10,624 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:10,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361373781] [2019-10-14 21:45:10,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,625 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 21:45:10,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361373781] [2019-10-14 21:45:10,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692135275] [2019-10-14 21:45:10,813 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 21:45:10,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:10,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:10,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:10,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 21:45:10,895 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:10,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:10,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624246278] [2019-10-14 21:45:10,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:10,896 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:10,896 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 13 states. [2019-10-14 21:45:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:11,037 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2019-10-14 21:45:11,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:11,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-10-14 21:45:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:11,039 INFO L225 Difference]: With dead ends: 101 [2019-10-14 21:45:11,039 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:45:11,040 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:11,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:45:11,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-14 21:45:11,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:45:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-10-14 21:45:11,049 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 51 [2019-10-14 21:45:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:11,049 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-10-14 21:45:11,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-10-14 21:45:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:45:11,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,050 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:11,261 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1825288524, now seen corresponding path program 9 times [2019-10-14 21:45:11,262 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911573651] [2019-10-14 21:45:11,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-14 21:45:11,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911573651] [2019-10-14 21:45:11,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957178404] [2019-10-14 21:45:11,420 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:12,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:12,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-14 21:45:13,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-10-14 21:45:13,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188581224] [2019-10-14 21:45:13,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:13,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:13,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:13,017 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 15 states. [2019-10-14 21:45:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,181 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-10-14 21:45:13,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:13,182 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2019-10-14 21:45:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,183 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:45:13,183 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:45:13,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:45:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-14 21:45:13,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:45:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-10-14 21:45:13,192 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2019-10-14 21:45:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,193 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-10-14 21:45:13,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-10-14 21:45:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:45:13,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,194 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:13,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,398 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1177185202, now seen corresponding path program 10 times [2019-10-14 21:45:13,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743639951] [2019-10-14 21:45:13,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-14 21:45:13,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743639951] [2019-10-14 21:45:13,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702837823] [2019-10-14 21:45:13,553 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:13,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:13,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:13,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-14 21:45:13,686 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:13,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828008260] [2019-10-14 21:45:13,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:13,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:13,694 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2019-10-14 21:45:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,911 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2019-10-14 21:45:13,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:13,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2019-10-14 21:45:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,913 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:45:13,913 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 21:45:13,914 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 21:45:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-10-14 21:45:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:45:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-10-14 21:45:13,922 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2019-10-14 21:45:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,922 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-10-14 21:45:13,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-10-14 21:45:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:45:13,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,924 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:14,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:14,139 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:14,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:14,139 INFO L82 PathProgramCache]: Analyzing trace with hash 342894732, now seen corresponding path program 11 times [2019-10-14 21:45:14,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:14,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352536929] [2019-10-14 21:45:14,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-10-14 21:45:14,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352536929] [2019-10-14 21:45:14,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711866276] [2019-10-14 21:45:14,351 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,223 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:45:23,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:23,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:45:23,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-10-14 21:45:23,259 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:23,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:45:23,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906999216] [2019-10-14 21:45:23,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:45:23,260 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:45:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:45:23,261 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 16 states. [2019-10-14 21:45:23,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:23,438 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2019-10-14 21:45:23,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:45:23,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-10-14 21:45:23,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:23,440 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:45:23,440 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:45:23,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:45:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:45:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-14 21:45:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:45:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-10-14 21:45:23,447 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2019-10-14 21:45:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:23,448 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-10-14 21:45:23,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:45:23,448 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-10-14 21:45:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:45:23,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:23,449 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:23,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:23,660 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:23,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1686898, now seen corresponding path program 12 times [2019-10-14 21:45:23,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:23,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41743232] [2019-10-14 21:45:23,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:23,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-10-14 21:45:23,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41743232] [2019-10-14 21:45:23,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768333373] [2019-10-14 21:45:23,825 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:49,634 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:45:49,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:49,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:45:49,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 36 proven. 78 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-10-14 21:45:49,689 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:49,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-10-14 21:45:49,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866828951] [2019-10-14 21:45:49,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:45:49,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:45:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:45:49,694 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 18 states. [2019-10-14 21:45:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:49,852 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2019-10-14 21:45:49,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:45:49,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2019-10-14 21:45:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:49,854 INFO L225 Difference]: With dead ends: 129 [2019-10-14 21:45:49,854 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:45:49,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:45:49,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:45:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-14 21:45:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:45:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-10-14 21:45:49,861 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 67 [2019-10-14 21:45:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:49,862 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-10-14 21:45:49,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:45:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-10-14 21:45:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:45:49,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:49,863 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:50,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:50,075 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash 106590156, now seen corresponding path program 13 times [2019-10-14 21:45:50,075 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:50,076 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010458471] [2019-10-14 21:45:50,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:50,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:50,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-10-14 21:45:50,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010458471] [2019-10-14 21:45:50,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066442921] [2019-10-14 21:45:50,282 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:50,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:45:50,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-10-14 21:45:50,397 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:50,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:45:50,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92240553] [2019-10-14 21:45:50,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:45:50,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:50,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:45:50,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:45:50,400 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 18 states. [2019-10-14 21:45:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:50,549 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2019-10-14 21:45:50,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:45:50,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2019-10-14 21:45:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:50,550 INFO L225 Difference]: With dead ends: 136 [2019-10-14 21:45:50,550 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:45:50,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:45:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:45:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-14 21:45:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 21:45:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-10-14 21:45:50,558 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-10-14 21:45:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:50,558 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-10-14 21:45:50,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:45:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-10-14 21:45:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:45:50,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:50,559 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:50,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:50,764 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1965252814, now seen corresponding path program 14 times [2019-10-14 21:45:50,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:50,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303673852] [2019-10-14 21:45:50,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:50,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:50,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-10-14 21:45:50,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303673852] [2019-10-14 21:45:50,959 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523973807] [2019-10-14 21:45:50,959 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:51,031 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:51,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:51,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:45:51,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-10-14 21:45:51,072 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:51,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:45:51,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823331582] [2019-10-14 21:45:51,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:45:51,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:45:51,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:45:51,074 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 19 states. [2019-10-14 21:45:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:51,253 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2019-10-14 21:45:51,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:45:51,254 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-10-14 21:45:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:51,255 INFO L225 Difference]: With dead ends: 143 [2019-10-14 21:45:51,255 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:45:51,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:45:51,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:45:51,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-10-14 21:45:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 21:45:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-10-14 21:45:51,262 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 75 [2019-10-14 21:45:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:51,262 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-10-14 21:45:51,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:45:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-10-14 21:45:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:45:51,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:51,263 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:51,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:51,468 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:51,468 INFO L82 PathProgramCache]: Analyzing trace with hash -38631668, now seen corresponding path program 15 times [2019-10-14 21:45:51,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:51,469 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011245064] [2019-10-14 21:45:51,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:51,469 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:51,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-10-14 21:45:51,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011245064] [2019-10-14 21:45:51,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030110431] [2019-10-14 21:45:51,674 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true