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-crafted/zero_sum_const_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:43,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:43,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:43,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:43,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:43,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:43,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:43,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:43,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:43,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:43,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:43,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:43,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:43,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:43,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:43,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:43,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:43,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:43,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:43,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:43,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:43,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:43,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:43,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:43,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:41:43,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:43,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:43,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:43,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:43,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:43,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:43,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:43,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:43,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:43,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:43,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:43,299 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 21:41:43,330 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:43,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:43,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:43,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:43,336 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:43,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:43,336 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:43,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:43,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:43,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:43,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:43,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:43,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:43,338 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:43,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:43,338 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:43,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:43,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:43,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:43,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:43,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:43,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:43,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:43,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:43,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:43,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:43,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:43,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:43,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:43,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:43,678 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:43,681 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:43,683 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:43,683 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:43,684 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-10-14 21:41:43,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61daf9e3a/612f454d72324208bb9e795082dbff15/FLAG5a300c02f [2019-10-14 21:41:44,227 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:44,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2019-10-14 21:41:44,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61daf9e3a/612f454d72324208bb9e795082dbff15/FLAG5a300c02f [2019-10-14 21:41:44,548 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61daf9e3a/612f454d72324208bb9e795082dbff15 [2019-10-14 21:41:44,558 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:44,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:44,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:44,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:44,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:44,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7492c7de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44, skipping insertion in model container [2019-10-14 21:41:44,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,576 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:44,601 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:44,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:44,804 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:44,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:44,841 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:44,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44 WrapperNode [2019-10-14 21:41:44,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:44,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:44,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:44,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:44,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (1/1) ... [2019-10-14 21:41:44,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:44,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:44,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:44,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:44,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (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 21:41:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:45,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:45,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-14 21:41:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:41:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:45,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:41:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:45,455 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:45,456 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:41:45,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:45 BoogieIcfgContainer [2019-10-14 21:41:45,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:45,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:45,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:45,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:45,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:44" (1/3) ... [2019-10-14 21:41:45,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589aa04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:45, skipping insertion in model container [2019-10-14 21:41:45,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:44" (2/3) ... [2019-10-14 21:41:45,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589aa04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:45, skipping insertion in model container [2019-10-14 21:41:45,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:45" (3/3) ... [2019-10-14 21:41:45,465 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2019-10-14 21:41:45,473 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:45,480 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:45,490 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:45,518 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:45,518 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:45,518 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:45,518 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:45,518 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:45,519 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:45,519 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:45,519 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-14 21:41:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:45,548 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:45,549 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] [2019-10-14 21:41:45,551 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-10-14 21:41:45,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:45,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712941628] [2019-10-14 21:41:45,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,774 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 21:41:45,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712941628] [2019-10-14 21:41:45,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:45,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:45,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832581912] [2019-10-14 21:41:45,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:45,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:45,802 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-14 21:41:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:45,963 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2019-10-14 21:41:45,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:45,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-14 21:41:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:45,976 INFO L225 Difference]: With dead ends: 81 [2019-10-14 21:41:45,976 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:41:45,981 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 21:41:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:41:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 21:41:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:41:46,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-14 21:41:46,030 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-10-14 21:41:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,031 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-14 21:41:46,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-14 21:41:46,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:46,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,037 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] [2019-10-14 21:41:46,037 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,039 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-10-14 21:41:46,039 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907812885] [2019-10-14 21:41:46,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,251 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 21:41:46,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907812885] [2019-10-14 21:41:46,252 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:46,252 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:46,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212334936] [2019-10-14 21:41:46,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:46,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:46,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:46,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:46,257 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2019-10-14 21:41:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:46,498 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-10-14 21:41:46,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:46,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-14 21:41:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:46,501 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:41:46,501 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:41:46,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:41:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 21:41:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-10-14 21:41:46,515 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-10-14 21:41:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,516 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-10-14 21:41:46,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:46,516 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-10-14 21:41:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:41:46,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,518 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] [2019-10-14 21:41:46,518 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-10-14 21:41:46,519 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,519 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261464372] [2019-10-14 21:41:46,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,520 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,626 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 21:41:46,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261464372] [2019-10-14 21:41:46,627 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:46,627 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:46,627 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441236089] [2019-10-14 21:41:46,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:46,628 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:46,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:46,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:46,629 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 4 states. [2019-10-14 21:41:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:46,793 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-10-14 21:41:46,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:46,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-14 21:41:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:46,795 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:41:46,796 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:41:46,796 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 21:41:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:41:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 21:41:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:41:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-10-14 21:41:46,805 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-10-14 21:41:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:46,806 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-10-14 21:41:46,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-10-14 21:41:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:46,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:46,808 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] [2019-10-14 21:41:46,808 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-10-14 21:41:46,809 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:46,809 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616548999] [2019-10-14 21:41:46,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,810 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:46,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:46,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616548999] [2019-10-14 21:41:46,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:46,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:46,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772213944] [2019-10-14 21:41:46,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:46,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:46,908 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 5 states. [2019-10-14 21:41:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:47,156 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-10-14 21:41:47,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:47,157 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-14 21:41:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:47,158 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:41:47,158 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:41:47,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 21:41:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:41:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-14 21:41:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:41:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-14 21:41:47,167 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-10-14 21:41:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:47,167 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-14 21:41:47,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:47,168 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-14 21:41:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:41:47,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:47,169 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:47,170 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-10-14 21:41:47,170 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:47,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706678069] [2019-10-14 21:41:47,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,171 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:47,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706678069] [2019-10-14 21:41:47,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149277501] [2019-10-14 21:41:47,292 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 21:41:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:47,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:47,425 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:47,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:47,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567342715] [2019-10-14 21:41:47,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:47,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:47,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:47,428 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 7 states. [2019-10-14 21:41:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:47,596 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-10-14 21:41:47,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:47,597 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-14 21:41:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:47,598 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:41:47,598 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:41:47,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:41:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 21:41:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:41:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-10-14 21:41:47,612 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2019-10-14 21:41:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:47,612 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-10-14 21:41:47,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-10-14 21:41:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:41:47,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:47,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:47,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:47,817 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash 589604962, now seen corresponding path program 2 times [2019-10-14 21:41:47,818 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:47,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900735815] [2019-10-14 21:41:47,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:47,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:41:47,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900735815] [2019-10-14 21:41:47,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083287343] [2019-10-14 21:41:47,943 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 21:41:48,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:48,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:48,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:48,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:41:48,071 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:48,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:48,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119002311] [2019-10-14 21:41:48,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:48,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:48,081 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-10-14 21:41:48,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:48,334 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2019-10-14 21:41:48,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:48,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2019-10-14 21:41:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:48,336 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:41:48,337 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:41:48,338 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:41:48,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2019-10-14 21:41:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:41:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-10-14 21:41:48,354 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2019-10-14 21:41:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:48,354 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-10-14 21:41:48,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-10-14 21:41:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:41:48,356 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:48,356 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2019-10-14 21:41:48,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:48,560 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:48,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1474058926, now seen corresponding path program 3 times [2019-10-14 21:41:48,562 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:48,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737255434] [2019-10-14 21:41:48,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:48,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:48,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:52,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737255434] [2019-10-14 21:41:52,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124426729] [2019-10-14 21:41:52,050 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 21:41:52,123 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:52,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:52,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-14 21:41:52,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:57,057 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:57,058 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-10-14 21:41:57,059 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-14 21:41:57,072 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:57,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:57,078 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:41:57,079 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-10-14 21:41:57,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:57,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:57,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:57,622 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:57,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 89 [2019-10-14 21:41:57,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276780869] [2019-10-14 21:41:57,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-10-14 21:41:57,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:57,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-10-14 21:41:57,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=7533, Unknown=0, NotChecked=0, Total=7832 [2019-10-14 21:41:57,628 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 89 states. [2019-10-14 21:42:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:12,300 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2019-10-14 21:42:12,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-10-14 21:42:12,302 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 64 [2019-10-14 21:42:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:12,306 INFO L225 Difference]: With dead ends: 174 [2019-10-14 21:42:12,306 INFO L226 Difference]: Without dead ends: 168 [2019-10-14 21:42:12,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=718, Invalid=17372, Unknown=0, NotChecked=0, Total=18090 [2019-10-14 21:42:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-14 21:42:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2019-10-14 21:42:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:42:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2019-10-14 21:42:12,329 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2019-10-14 21:42:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:12,330 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2019-10-14 21:42:12,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-10-14 21:42:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2019-10-14 21:42:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:42:12,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:12,331 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2019-10-14 21:42:12,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:12,535 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:12,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1815286352, now seen corresponding path program 4 times [2019-10-14 21:42:12,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:12,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256960835] [2019-10-14 21:42:12,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:12,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:12,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:42:12,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256960835] [2019-10-14 21:42:12,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895581924] [2019-10-14 21:42:12,645 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 21:42:12,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:12,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:12,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:12,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:42:12,821 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:12,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:42:12,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400853277] [2019-10-14 21:42:12,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:12,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:12,823 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 14 states. [2019-10-14 21:42:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:13,294 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2019-10-14 21:42:13,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:13,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:42:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:13,299 INFO L225 Difference]: With dead ends: 237 [2019-10-14 21:42:13,300 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 21:42:13,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 21:42:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2019-10-14 21:42:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:42:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2019-10-14 21:42:13,317 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 66 [2019-10-14 21:42:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:13,317 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2019-10-14 21:42:13,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2019-10-14 21:42:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 21:42:13,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:13,319 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1] [2019-10-14 21:42:13,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:13,524 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1556829298, now seen corresponding path program 5 times [2019-10-14 21:42:13,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:13,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595202989] [2019-10-14 21:42:13,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:13,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:13,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:42:13,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595202989] [2019-10-14 21:42:13,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006770503] [2019-10-14 21:42:13,626 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 21:42:13,752 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:42:13,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:13,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:13,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:42:13,825 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:13,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:42:13,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336144696] [2019-10-14 21:42:13,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:42:13,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:13,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:42:13,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:13,827 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 14 states. [2019-10-14 21:42:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:14,327 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2019-10-14 21:42:14,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:14,327 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2019-10-14 21:42:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:14,328 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:42:14,328 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:42:14,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:42:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-10-14 21:42:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:42:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2019-10-14 21:42:14,338 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2019-10-14 21:42:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:14,338 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2019-10-14 21:42:14,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:42:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2019-10-14 21:42:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:42:14,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:14,340 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-14 21:42:14,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:14,554 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:14,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:14,555 INFO L82 PathProgramCache]: Analyzing trace with hash 249886016, now seen corresponding path program 6 times [2019-10-14 21:42:14,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:14,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971502386] [2019-10-14 21:42:14,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:14,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:14,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:16,008 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2019-10-14 21:42:16,594 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2019-10-14 21:42:16,772 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2019-10-14 21:42:16,962 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-10-14 21:42:17,154 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2019-10-14 21:42:17,723 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-10-14 21:42:17,892 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2019-10-14 21:42:18,064 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2019-10-14 21:42:18,269 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-10-14 21:42:18,449 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-10-14 21:42:18,652 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2019-10-14 21:42:19,093 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2019-10-14 21:42:19,296 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2019-10-14 21:42:19,483 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2019-10-14 21:42:19,697 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-10-14 21:42:19,925 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2019-10-14 21:42:20,157 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2019-10-14 21:42:20,477 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2019-10-14 21:42:20,901 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2019-10-14 21:42:21,150 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2019-10-14 21:42:21,362 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2019-10-14 21:42:21,614 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-10-14 21:42:22,336 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2019-10-14 21:42:22,531 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2019-10-14 21:42:22,741 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-10-14 21:42:22,967 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2019-10-14 21:42:23,201 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2019-10-14 21:42:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:25,759 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971502386] [2019-10-14 21:42:25,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013467797] [2019-10-14 21:42:25,760 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 21:42:25,828 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:42:25,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:25,831 WARN L254 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 121 conjunts are in the unsatisfiable core [2019-10-14 21:42:25,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:25,980 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:42:25,981 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:25,986 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:25,987 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:25,987 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16