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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:21,971 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:21,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:21,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:21,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:21,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:21,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:22,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:22,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:22,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:22,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:22,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:22,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:22,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:22,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:22,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:22,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:22,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:22,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:22,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:22,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:22,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:22,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:22,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:22,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:22,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:22,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:22,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:22,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:22,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:22,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:22,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:22,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:22,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:22,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:22,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:22,055 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 21:43:22,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:22,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:22,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:22,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:22,089 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:22,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:22,089 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:22,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:22,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:22,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:22,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:22,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:22,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:22,092 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:22,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:22,093 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:22,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:22,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:22,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:22,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:22,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:22,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:22,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:22,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:22,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:22,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:22,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:22,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:22,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:22,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:22,386 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:22,390 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:22,391 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:22,392 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:22,393 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-10-14 21:43:22,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7765623df/b93c1a0dbd7045e0a903f4f725c419d4/FLAG2250e054e [2019-10-14 21:43:22,916 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:22,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy5_ground-2.i [2019-10-14 21:43:22,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7765623df/b93c1a0dbd7045e0a903f4f725c419d4/FLAG2250e054e [2019-10-14 21:43:23,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7765623df/b93c1a0dbd7045e0a903f4f725c419d4 [2019-10-14 21:43:23,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:23,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:23,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:23,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:23,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:23,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a8f9260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23, skipping insertion in model container [2019-10-14 21:43:23,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,345 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:23,368 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:23,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:23,571 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:23,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:23,700 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:23,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23 WrapperNode [2019-10-14 21:43:23,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:23,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:23,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:23,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:23,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (1/1) ... [2019-10-14 21:43:23,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:23,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:23,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:23,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:23,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (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 21:43:23,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:23,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:23,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:23,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:23,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:24,196 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:24,197 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-14 21:43:24,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:24 BoogieIcfgContainer [2019-10-14 21:43:24,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:24,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:24,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:24,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:24,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:23" (1/3) ... [2019-10-14 21:43:24,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a924023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:24, skipping insertion in model container [2019-10-14 21:43:24,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:23" (2/3) ... [2019-10-14 21:43:24,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a924023 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:24, skipping insertion in model container [2019-10-14 21:43:24,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:24" (3/3) ... [2019-10-14 21:43:24,207 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2019-10-14 21:43:24,217 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:24,224 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:24,236 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:24,261 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:24,262 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:24,262 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:24,262 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:24,262 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:24,262 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:24,262 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:24,263 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-10-14 21:43:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:43:24,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,288 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 21:43:24,290 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2095174276, now seen corresponding path program 1 times [2019-10-14 21:43:24,303 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416007568] [2019-10-14 21:43:24,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,485 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 21:43:24,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416007568] [2019-10-14 21:43:24,487 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,488 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:24,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144040810] [2019-10-14 21:43:24,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:24,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:24,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:24,521 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-10-14 21:43:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,729 INFO L93 Difference]: Finished difference Result 70 states and 97 transitions. [2019-10-14 21:43:24,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:24,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-14 21:43:24,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,745 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:43:24,745 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:43:24,751 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 21:43:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:43:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 21:43:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:43:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-10-14 21:43:24,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-10-14 21:43:24,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,820 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-10-14 21:43:24,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-10-14 21:43:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:43:24,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,824 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 21:43:24,825 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1625097866, now seen corresponding path program 1 times [2019-10-14 21:43:24,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342267919] [2019-10-14 21:43:24,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,967 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 21:43:24,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342267919] [2019-10-14 21:43:24,968 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:24,968 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:24,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269749644] [2019-10-14 21:43:24,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:24,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:24,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:24,971 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 4 states. [2019-10-14 21:43:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,089 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2019-10-14 21:43:25,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:25,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:43:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,090 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:43:25,091 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:43:25,092 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 21:43:25,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:43:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 21:43:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:43:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-10-14 21:43:25,100 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2019-10-14 21:43:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,101 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-10-14 21:43:25,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-10-14 21:43:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:25,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,102 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, 1, 1] [2019-10-14 21:43:25,102 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1623092332, now seen corresponding path program 1 times [2019-10-14 21:43:25,103 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981459169] [2019-10-14 21:43:25,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:25,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981459169] [2019-10-14 21:43:25,187 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:25,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:25,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105817940] [2019-10-14 21:43:25,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:25,189 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:25,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:25,191 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2019-10-14 21:43:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,339 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-10-14 21:43:25,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:25,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:43:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,341 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:43:25,341 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:43:25,342 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 21:43:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:43:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-10-14 21:43:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:43:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2019-10-14 21:43:25,350 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 25 [2019-10-14 21:43:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,351 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2019-10-14 21:43:25,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2019-10-14 21:43:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:43:25,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:25,353 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1928668694, now seen corresponding path program 1 times [2019-10-14 21:43:25,354 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052674486] [2019-10-14 21:43:25,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:25,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052674486] [2019-10-14 21:43:25,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508023719] [2019-10-14 21:43:25,511 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 21:43:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:25,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:25,631 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:25,631 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:43:25,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044008251] [2019-10-14 21:43:25,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:43:25,633 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:25,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:43:25,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:43:25,633 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2019-10-14 21:43:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:25,735 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-14 21:43:25,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:43:25,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-10-14 21:43:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:25,737 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:43:25,737 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:43:25,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 21:43:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:43:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-10-14 21:43:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:43:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-10-14 21:43:25,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 35 [2019-10-14 21:43:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:25,745 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-10-14 21:43:25,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:43:25,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-10-14 21:43:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:43:25,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:25,747 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:25,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,960 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 359479048, now seen corresponding path program 2 times [2019-10-14 21:43:25,962 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206471828] [2019-10-14 21:43:25,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:26,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206471828] [2019-10-14 21:43:26,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840951753] [2019-10-14 21:43:26,093 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 21:43:26,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:26,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:26,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:26,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:26,217 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:26,217 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:43:26,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401590150] [2019-10-14 21:43:26,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:43:26,219 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:43:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:26,220 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 7 states. [2019-10-14 21:43:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:26,324 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2019-10-14 21:43:26,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:43:26,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2019-10-14 21:43:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:26,325 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:43:26,326 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:43:26,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 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 21:43:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:43:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 21:43:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:43:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-10-14 21:43:26,338 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 37 [2019-10-14 21:43:26,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:26,339 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-10-14 21:43:26,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:43:26,340 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-10-14 21:43:26,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:43:26,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:26,342 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:26,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:26,550 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:26,550 INFO L82 PathProgramCache]: Analyzing trace with hash 246203558, now seen corresponding path program 3 times [2019-10-14 21:43:26,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:26,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757734355] [2019-10-14 21:43:26,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:26,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:43:26,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757734355] [2019-10-14 21:43:26,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653660128] [2019-10-14 21:43:26,662 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 21:43:26,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:43:26,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:26,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:26,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:43:26,776 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:26,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 21:43:26,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896977956] [2019-10-14 21:43:26,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:26,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:26,779 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 9 states. [2019-10-14 21:43:27,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,026 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2019-10-14 21:43:27,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:43:27,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2019-10-14 21:43:27,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,030 INFO L225 Difference]: With dead ends: 93 [2019-10-14 21:43:27,030 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:43:27,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:43:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2019-10-14 21:43:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:43:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-10-14 21:43:27,048 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 39 [2019-10-14 21:43:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,048 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-10-14 21:43:27,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-10-14 21:43:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:43:27,050 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,050 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:43:27,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:27,262 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,262 INFO L82 PathProgramCache]: Analyzing trace with hash 575548698, now seen corresponding path program 4 times [2019-10-14 21:43:27,262 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43299909] [2019-10-14 21:43:27,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:43:27,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43299909] [2019-10-14 21:43:27,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084764670] [2019-10-14 21:43:27,436 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 21:43:27,506 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:27,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:27,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:27,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 21:43:27,569 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:27,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-10-14 21:43:27,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138404660] [2019-10-14 21:43:27,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:43:27,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:43:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:27,571 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 11 states. [2019-10-14 21:43:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:27,771 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2019-10-14 21:43:27,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:43:27,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-10-14 21:43:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:27,773 INFO L225 Difference]: With dead ends: 115 [2019-10-14 21:43:27,773 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:43:27,774 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:43:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:43:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2019-10-14 21:43:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 21:43:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-10-14 21:43:27,789 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2019-10-14 21:43:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:27,789 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-10-14 21:43:27,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:43:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-10-14 21:43:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:43:27,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:27,792 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 21:43:27,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:27,996 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:27,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:27,996 INFO L82 PathProgramCache]: Analyzing trace with hash 186079118, now seen corresponding path program 5 times [2019-10-14 21:43:27,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:27,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312533312] [2019-10-14 21:43:27,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:27,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-14 21:43:28,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312533312] [2019-10-14 21:43:28,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123028937] [2019-10-14 21:43:28,147 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